Soft dB E-336 User Manual

Opus Suite

Soft dB Inc.
1040,
Quebec (Quebec) Canada G1S 3G3
Toll free: 1
E-mail: [e-mail]

Building Acoustics Module
Airborne Sound Isolation between Rooms
ASTM E 336 / ISO 140-4

User Guide – v1.1
2012-12-06

Belvedere Avenue, Suite 215

Compatible Hardware:

Alto 6-Channel

Concerto 4-Channel

I-Track 6-Channel

-866-686-0993 (USA and Canada)

CONTENTS

1 Introduction ........................................................................................................................... 2

2 Compatible Hardware ............................................................................................................. 3

3 Opus Environment .................................................................................................................. 4

4 Quick Start .............................................................................................................................. 6

5 Main Interface ...................................................................................................................... 11

6 Setup Interface ..................................................................................................................... 13

6.1 Sensor Calibration ................................................................................................................... 15

7 Measurements tab ................................................................................................................ 16

7.1 Level Measurement Interface ................................................................................................. 19

7.2 Reverberation Measurement Interface .................................................................................. 20

7.2.1 Reverberation: Time Decay ............................................................................................ 21

7.2.2 Reverberation: Spectrum ................................................................................................ 22

7.2.3 Reverberation: Data ........................................................................................................ 23

8 Result tab ............................................................................................................................. 24

9 Comments tab ...................................................................................................................... 26

10 Explorer Dialog ..................................................................................................................... 27

11 File Manager ......................................................................................................................... 28

Appendix 1: Concerto Hardware ................................................................................................. 30

Appendix 2: 1/3 Octave Filters – IEC 61260 Class 1/ANSI S1.11 ..................................................... 34

i

Test Method ASTM E336-05 and Test Method ISO 140-4

1 Introduction

Congratulations on your purchase of the Opus Suite STC module.

The Opus Software Suite is a Sound and Vibration software that contains several measurement
modules:

• SLM 4-ch module : 4-channels, Class 1 (IEC 61672 and ANSI S1.43)

• SLM & 3Vib module : 1 SLM channel (same as SLM 4-ch module) and 3 vibration channels

(ISO 8041 and ISO 2631)

• Data Logger module

• Building Acoustic module

• Sound Transmission (ASTM E 336/ISO 140-4)

• Reverberation Time (ISO 3382)

• Speech Privacy (ASTM E 2638 and ASTM E 1130)

• Building Vibration module (DIN 45669-1 and ANSI S2.46)

• Intensity module (IEC 1043)

The Opus Suite is intended to run on a Concerto. The software can also be installed on a computer if
an Alto-6ch or an I-Track unit is connected. Moreover, some post-processing functions are available
on a PC even if no compatible unit is detected.

The current user’s manual presents the STC Module.

General Specifications

Standard Test Method for Measurement of Airborne Sound Attenuation
between Rooms in Buildings.
Both standards are designed to measure the sound isolation a partition

Standards

Software Features

between two rooms. The result is expressed as a Sound Transmission Class
(STC) index.
The two standards differ slightly in the frequency range that is considered
for the evaluation. The ASTM ranges from 125 to 4000 Hz. The ISO ranges
from 100 to 3150 Hz.

• Intuitive interface for STC measurement

• Embedded noise generator (white or pink noise)

• Real time 1/3 octave band spectrum (IEC 1260 Type 1)

• Reverberation evaluation with auto interrupted method

• Automated calculation of the STC Index

• Expendable interface to allow repetitions of a measurement type.

• Multiple partitions in the same file

• Save, load and export measurement files

2

Concerto 4-Channel

Handy, lightweight, fully rugged military grade (MIL-STD-810F

Alto 6-Channel

Small, rugged aluminum case with LCD.

I-Track 6-Channel

Fully rugged military grade (MIL-STD-810F and IP54) notebook

2 Compatible Hardware

Every hardware option has an embedded state of the art Soft dB SR-MK3 DSP board allowing real­time and precise measurement with very low energy consumption.

and IP67) tablet PC with anti-glare & anti-scratch touch screen
All in one instrument (no PC required)
WLAN communication allows using the Concerto as a monitoring
station with remote access.
www.softdb.com/concerto.php

Built-in battery
USB 2.0 connection (PC required)
Compact size
Low cost

with 13.3” anti-glare screen.
The I-Track system is primarily intended for real-time sound
mapping. However, the Opus Software Suite can be used on this
platform.
www.softdb.com/itrack.php

3

3 Opus Environment

The Concerto unit comes equipped with the Opus Environment. This environment acts as a main
interface that gives access to the different modules and tools.

4

The Quit button will quit the application differently according to the

Modules

The modules buttons will launch the associated module. When a module is
opened, a license verification check is done. If no license is found for that
module, a message will indicate the limitations.

The File Manger button will launch the File Manager Utility (see section 10, p.

26)

The Software Install button will launch a browser from which an Opus
software installer can be launched.

The Network Manager button will launch the Network Manager interface.
This tools is only available on a Concerto hardware

The Unit info gives the information about the hardware type (Concerto, Alto­6ch or I-Track) and the serial number of the unit.

The Clock indicator displays the time and date on the unit. To change time,
simply click on the indicator to display a dialog window.

hardware used.
Concerto hardware:

• Hold 5 sec to shut down the unit.

• Press and release to enter standby mode.

Alto-6ch or I-Track hardware:

• Press and release to close the application and return to Windows.

5

Elements to

measure

Measure the

4 Quick Start

The STC module is part of the Building Acoustic. It can be accessed in the Building Acoustic menu of
the Opus Suite panel.

Measurement tab

selected element

What you should know…

• The partition area and the receiving room volume are used to evaluate de STC.

• You need at least 4 measurements: level in the source room (source on), level in the

receiving room (source on), background level in the receiving room (source off) and
reverberation time in the receiving room.

• The main interface let do an unlimited quantity of measurements for every type of data.

• Select the corresponding column header to see the average of the different measurements

of a type of data.

• The selected element of the table shows a green background. The details of the selection

are displayed on the right side of the table.

• The elements still to measure display a question mark (?) as a value and have a yellow

background.

6

Step 1 Setup the unit

Click on the button to access the setup interface. The parameter should typically be
set as shown on figure above.

Before a measurement, the operator should set the sensitivity of the sensor used. This sensitivity can
be set manually if it is known. Preferably, the sensor sensibility should be set by using the software

calibration tool and a calibrator. To do so, click on and follow the instructions of the
Sensor Calibration (section 0, p.15).

The level measurement can be made using an external generator or the internal generator (pink or
white noise).

Click to return to the main panel.

7

Start the

Average

Accept the

measurement

Step 2 Do a Level Measurement

To proceed to a measurement, select an element to measure in the table of the main panel and click

the button to open the measurement interface.

Once in the measurement panel, click on the button to start the average
measurement. The acquisition end by itself once the average period is reached (as set in setup) and
can be stopped at any time.

Click on the button to accept the measurement.

• An omnidirectional should be used

• Source at least 5 m away from the partition if possible. Otherwise, in the opposite corners

of the room.

• If several source positions, the distance between positions should be at least 2 m.

• For a fixed position measurement, the averaging time should be at least 10 seconds.

• For a moving average measurement, the averaging time should be at least 30 seconds.

• The microphones must be kept more than 1 m away from the tested partition.

• If possible, the microphones should be kept more than 1 m away from all other major

extended surface or 0.5 m away otherwise.

• The microphones should be kept way from the source: >1m if room <25m³, >1.5m if room

<100m³, >2m if room >100m³.

• If fixed microphone positions is used, at least 6 positions (as least 1 m apart) should be

used for each room.

• If moving microphones is used, the microphone speed should not exceed 0.5 m/s.

8

Start the

Measurement

Accept the

measurement

Step 3 Do a Reverberation Measurement

To proceed to a reverberation measurement, select an element to measure in the table of the main

panel and click the button to open the measurement interface.

Once in the measurement panel, click on the button to start the reverberation
measurement. The acquisition end by itself once the number of averages is reached.

Click on the button to accept the measurement.

• An omnidirectional should be used

• A first source position should be in center of the receiving room.

• Several fixed microphone locations should be used.

• Keep the microphone at least 1 meter away from any major extended surface.

• Keep the microphone at least 1 meter away from the source.

• The more source positions and the more microphone position, the more the reverberation

time will be representative.

9

Step 4 Analyze the results

The result tab displays the results of the sound transmission class to the evaluated partitions.

The measurements can be saved and exported through the menu of the button.

10

Standard used for the STC evaluation. The standard can be
Main interface tabs:

File name of the measurement.

Click this button to display the help window.

5 Main Interface

Main controls and indicators

Figure 1: Main interface

changed at any time. The only difference is the frequency span
used for the display and for the global value evaluation.

• ASTM E336-05, bands from 125 to 4000 Hz

• ISO 140-4, bands from 100 to 3150 Hz

• Measurements tab (section 7, p.16)

• Result tab (section8, p.24)

• Comments tab (section 9, p.26)

File Menu button (see the following table).

Setup button that calls the setup interface (section 6, p.13).

Module name and version number.

A green check on the disk icon indicates that the data are saved.

This help is a reminder of the steps and the rules to follow.

11

Exports the measurement data into a text file.
Launches the File Manager

Allows to quit the module and to return to the Opus Suite

File Menu

New

Open

Save

Save As…

Export

File Manager

Quit:

Creates a brand new measurement session.

Opens a previous measurement file.

Saves the current measurement into the specified file.

Saves the current measurement into a new file.

The file is saved as .xls extension and can be opened with
Microsoft Excel or any text editor.

(see section 10, p. 26)

Interface.

12

The input channel used for the measurements

two range settings (Low or High)

Alto

The sensor sensitivity can be entered manually or the Calibration

The dB reference is the unit reference from which the decibel (dB) is

6 Setup Interface

Input Setup

Figure 2: Setup interface

The available input types are AC and ICP sensors.

Selection of the dynamic range.

For a microphone sensitivity of 50mV/Pa.

- Low Range: 25 to 119 dBA

- High Range: 37-130 dBA

Concerto: the input 1 and 2 have
while inputs 3 and 4 have a single fixed range (Low).

-6ch and Itrack: only the low range is available.

interface can be used (see section 0, p.15).

calculated.

13

The average type of the two types of measurement can be adjusted

The Ymin and Ymax parameters set the vertical scale (levels in dB) of the

The number of average is the number of iterations used for the

Level Measurement Setup

The unit can be used to generate a pink noise or a white noise. The
output signal is balanced on output 1 and output 2.

If an external generator is used, the source type can be set to external.
This disables the outputs.

When an internal generator is used, the volume can be adjusted from 0
to 100%.

The average period of the two types of level measurement can be
adjusted independently.

independently. It can be adjusted to be a plain average (Leq) or a
statistic level (Lx%).
Using the statistics instead of the Leq can minimize the punctual noise
events that may occur during a measurement (especially for the
background noise).

spectrum graphs of the current module.

Reverberation Measurement Setup

The unit is used to generate a pink noise or a white noise. The output
signal is balanced on output 1 and output 2.

The volume of the internal generator can be adjusted from 0 to 100%.

The measurement length is the duration of the noise emission of one
iteration of the reverberation evaluation.

reverberation evaluation.

14

6.1 Sensor Calibration

The input sensitivity can be calibrated using the calibration function and a sensor calibrator. Click the

button on the Setup interface to launch the Calibration interface.

Step 1 Adjust the calibration parameters

The defaults values are:

• Averaging time: 5 s

• Frequency: 1 kHz

• Calibrator Level: 94 dB

Step 2 Install the calibrator device on the microphone
Step 3 Click START

After the average time is elapsed, the sensitivity value will update.

Step 4 Click OK to accept the sensitivity value

15

Details of the selected
element in the table

Partition Info

Table of Measurements

7 Measurements tab

The Measurements tab can be divided in three parts. The partition information is in upper left
corner. Just under is the table of measurements. Finally, the details of the selected element are on
the right side.

Measurements controls

The partition menu let you select the partition to measure.
To add a new partition, select the last element (“new…”) of the menu
ring.

To delete a partition, select the partition and press the button

The area (m²) of the partition to be qualified.

The volume (m³) of the receiving room.

The partition description let the user enter some basic information on
the partition being qualified.

16

Source room

Source on

Receiving room

Source on

Receiving room

Source off

Receiving room

Table of Measurements

If an element of the table is selected, the measurement interface will
be called (see the following subsections).

Click this button to delete the selected table element.

The import feature allows the user to load one column of data (one of
the 4 data types) from another partition of the same file. It is then
possible to avoid repeating the same measurements when several
partitions share data with each other.

Level measure

Level measure

Level measure

Reverberation

The measurement table contains four columns for the four types of measurement:

• Source room, level measurement, source on

• Receiving room, level measurement, source on

• Receiving room, level measurement, source off

• Receiving room, reverberation time measurement

Several measurements can be done for each of the four types. To add a new element in the table,
simply press on “new…” in the proper column. The average value of those measurements will later
be used in the STC evaluation. To see the average from the measurement tab, click on the header
element above the first measurement element of a column.

17

Name and global level of the selected element.

Details of the selected element in the table

Description of the selected element

Spectrum graph of the selected element in the table.

18

7.1 Level Measurement Interface

Level Measurement controls

The Start/Pause button starts/pauses the average measurements. The
measurement will stop by itself at the end of the average period.

The Stop button stops the average process

The Reset button restarts the average measurement.

Progress bar of the average time.

The average parameters of Average type and Average Period can be
modified directly on the Measurement Interface. The values will be
updated in the corresponding value of the Setup Interface (see section
6, p.11)

The dynamic range gives the information of the usage of the input
range.
When saturation occurs the indicator turns red. The word ‘Sat’ will also
be displayed over the indicator as soon as saturation is detected during
an average. Such a measurement should be rejected.

Once the measurement is acceptable, press the Accept button to
return to the main interface.

19

This indicator displays which reverberation indexes are met (i.e. if T10 is on,

7.2 Reverberation Measurement Interface

Figure 3: Reverberation Measurement Interface

Reverberation Measurement controls

The Run/Pause button starts/pauses the average measurements. The
measurement will stop by itself at the end of the average period.

The Stop button stops the average process.

The upper progress bar is the progression of the current iteration. The
bottom progress bar is the progression of the iterations relative to the
requested “Nbr Averages”.

it means that T10 was reached for every frequency bands and global).

The reverberation parameters can be modified directly on the
Measurement Interface. The values will be updated in the corresponding
value of the Setup Interface (see section 6, p.11)

The dynamic range gives the information of the usage of the input range.
When saturation occurs the indicator turns red. The word ‘Sat’ will also be
displayed over the indicator as soon as saturation is detected during an
average. Such a measurement should be rejected.

20

This graph displays the time decay curves for the selected frequency band

This array displays the computed results for the selected frequency band or

Once the measurement is acceptable, press the Accept button to return to
the main interface.

7.2.1 Reverberation: Time Decay

This display shows the response to a noise interruption. It also superimposes the curves used to
evaluate the reverberation time values and the averaged successive responses.

Figure 4: Time Decay tab of the reverberation

Time Decay Graph

or global.

These buttons are used to select the visible curves on the time decay
graph. T10, T20 and T30 are the straight lines used to determine the
reverberation times. All shows all the iterations in the averaging process.

These buttons are used to display the next or previous frequency band on
the time decay graph and in the results.

This button is used to switch between frequency bands and global.

global.

21

These buttons are used to select the result to display on the

This array displays the computed results for the selected frequency

7.2.2 Reverberation: Spectrum

This display shows a selected result for each frequency band and global using a bar graph. To select a
frequency or the global, simply click the corresponding bar.

spectrum graph and Global Bar.

This indicator displays the selected result for the global.

band or global. To select a frequency band, click on the spectrum at
the desired frequency to move the cursor. To select the global, click
on the global bar.

22

7.2.3 Reverberation: Data

This display shows all data for all frequency bands and global in a table form.

23

Details of the selected
element in the table

Table of Results

8 Result tab

Figure 5: Result tab

The Result tab of the main interface contains the table of result (left side) and the details (right side).
The table is expendable vertically as partitions are added (in the Measurements tab). Therefore, each
line of the table gives the result of one partition.

Table of Results

Partition index.

Average level in the source room while the source is turned on.

Average level in the receiving room while the source is turned on.

Average background level in the receiving room while the source is turned off.

Transmission loss of the partition.

Sound Transmission Class. This STC value is usually the apparent STC (ASTC), but can
also be the field STC (FSTC) if the flanking noise is properly reduced.

24

Details of the selected element in the table

Name and value of the selected element.
Description of the selected element

Spectrum graph of the selected partition.

25

9 Comments tab

The Comments tab on the main panel can be used as a general note pad that will be saved along with
the measurement data.

26

Directory Path

Displays the path of the active directory.

Accesses to common directories.

Displays the content of a directory and responds to common actions:

10 Explorer Dialog

File / Folder Operators

Directory Path

Directory Content Shortcuts

Explorer Window Controls and Indicators

• Go to parent directory

File/Folder

Operators

Shortcuts

Directory

Content

• Open directory

• Create new folder

• Rename folder or file

• Delete folder or file

When used on a stand-alone computer, those shortcuts are linked to:

• Desktop

• My Documents

• Computer

When used on a Concerto, the shortcuts are linked to:

• Opus Root

• USB Device.

• Single clicking on an element selects it.

• Double clicking on a directory opens it.

27

11 File Manager

The File manager is used to perform most file operations:

• Navigate the directory structure

• Create folders

• Rename files and folders

• Move or copy files and folders from one place to another

• Delete a file or a folder

Although not very useful on a stand-alone computer, this manager is necessary on the Concerto, on
which Windows explorer is unavailable. Its primary function is to allow the user to manage the
Concerto directory structure and to export files and folders to a USB memory stick.

Directory

Path

Shortcuts

Disk Info

Move/Copy

Operators

File/Folder

Operators

Directory

Content

28

Directory Path

Displays the path of the active directory.

Allows easy access to common directories. When the File Manager is used on a

Operators

Allows user to:
Displays the content of a directory and responds to common actions from the

Disk info

Displays the disk information of the associated hardware.

Shortcuts

stand-alone computer, these shortcuts are linked to:

• Desktop

• My Documents

• Computer

When the File Manager is used on a Concerto, the shortcuts are linked to:

• Opus Root

• USB Device.

Move/Copy

Copies or moves a file or folder from a source to its destination.

• Go to parent directory

File/Folder
Operators

• Open directory

• Create new folder

• Rename folder or file

• Delete folder or file

user:

Directory
Content

• Single clicking on an element will select it

• Double clicking on a directory will open it

• Dragging an element from one side to the other will copy it.

29

Appendix 1: Concerto Hardware

Connections

Mic

Stand

4 Inputs

Headphone Jack Loudspeaker

Power-on

button

¼ 20

insert

DC in

Second
Battery

2 Outputs USB

port

Battery indicator

Right click Enter Arrow keys

30

Press the trigger button located at the back of the unit
The stand-by mode allows fast load time.

Shutdown

To Shut down the unit, click and hold the Turn Off button for five seconds.

Power on/off

Power-on

Turn On

Stand-by

Turn Off

This key has two (2) functions:

1. To turn the unit ON.

2. Start a measurement once the SLM Module is loaded

After a few seconds, the Opus Environment Interface will appear.

• To put the unit on stand-by, click the Turn Off button.

Note: The unit can be in stand-by for more than three days without recharging,
provided batteries are fully charged prior to storage.

31

power reset

power reset

Power Reset

If the Concerto happens to crash and it is not possible to take back the control, a power reset might
be necessary. To complete the power reset, the three buttons on the front of the Concerto must be
used.

Here is the procedure:

Step 1 Press and hold the Function, Enter and Down Arrow button for 5 seconds until the

Concerto shuts down

Step 2 Wait 5 seconds and press the power button
Step 3 Wait 5 seconds and press the power button a second time to restart the Concerto from

a power reset.

Step 1 Step 2 and 3

Press and hold to trigger the

Power-on

Press 2 times

to restart from

32

DSP Processor

Texas Instruments TMS320C6424

Inputs

4

Outputs

2

Linear Range

2 x (25-120 dBA or 30-130 dBA) + 2 x (25-120 dBA)

Conditioning

AC, DC, ICP (4 mA)

Operating system

Intel Atom E660T 1.3 GHz

Storage

16 GB SSD

Data Transfer

USB

Display

180 mm (7 inches) WVGA (800 x 480)

Dimensions

230 x 185 x 60mm (9.0 x 7.3 x 2.4 inches)

Weight

1350 g (2.96 lb)

Battery

2 x Li-ion battery, 7.4 V, 3100 mAh, (1 internal + 1 hot-swappable)

Power

10-20 VDC, 2A

IEC 68-2-32 method 1 (Multiple 1m drops on concrete)

Inputs and Signal Processing Specifications (Embedded Signal Ranger MK3 DSP Board)

Physical (DAP Tech 9000 Tablet PC)

IP67 (Rain, Humidity, 1 meter immersion)
MIL-STD-810F method 506.4 procedure I (windblown rain)

Protection rating

Humidity: 95% non-condensing
Temperature: MIL-STD-810-F (-20 °C ... +50 °C);
Vibration: MIL-STD 810E 514.5

33

1/3 octave Filter Shape Test at 1000 Hz

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

100 1000 10000

Frequence (Hz)

Attenuation dB

Measurement High limit Low limit

Appendix 2: 1/3 Octave Filters – IEC 61260 Class 1/ANSI S1.11

1/3 Octave Filters

The 1/3 octave filters are computed at low-level in real time (at 48 kHz) on the digital signal
processor (DSP) of the Concerto system. The filters comply with all requirements of IEC 61260 for
Class 1.

Frequency Range

20 Hz to 20 kHz.

Filter Shape

The following curve presents the filter shape test done for the 1000 Hz 1/3 octave band. The red and
green curves represent the limits associated with the IEC standard (Class 1).

34

Frequency (Hz)

High limit (dB)

185.5

-75.0

327.5

-62.0

531.4

-42.5

772.6

-18.0

891.3

-2.3

919.6

0.15

947.0

0.15

974.0

0.15

1000.0

0.15

1026.7

0.15

1055.8

0.15

1087.5

0.15

1122.0

-2.3

1294.4

-18.0

1881.7

-42.5

3053.7

-62.0

5392.0

-75.0

Shape Test Numerical Results at 1 kHz

The following table presents the numerical results of the shape test at 1 kHz:

Low limit (dB) Measurement (dB)

-inf -96.0

-inf -85.1

-inf -61.1

-inf -28.2

-4.5 -3.0

-1.1 -0.3

-0.4 0.0

-0.2 0.0

-0.15 0.0

-0.2 0.0

-0.4 0.0

-1.1 -0.3

-4.5 -3.0

-inf -28.4

-inf -61.8

-inf -86.9

-inf -96.7

35

Saturation Level

(dB)

Minimum Linear

Level (dB)

Linear Dynamic

Range (dB)

20

1.3

25

0.7

31.5

2.0

40

1.2

50

1.1

63

3.2

80

0.4

100

-0.4

125

1.4

160

0.0

200

0.4

250

0.7

315

1.3

400

1.8

500

2.3

630

3.2

800

3.4

1000

4.3

1250

5.2

1600

6.1

2000

7.1

2500

8.2

3150

9.2

4000

10.1

5000

11.3

6300

12.6

8000

14.0

10000

16.9

1/3 Octave Filter Linearity

The linearity of the 1/3-octave filter has been measured for both ranges (low and high). The
experimentation is done with an adaptor (ADP092) and an electric signal. The results in dB are for an
input sensitivity of 50 mV/Pa. The maximum and the minimum linear levels are measured for each
1/3 octave band along with the noise floor.

Filter Linearity (Low Range)

Frequency (Hz)

Noise Floor (dB)

120.5 39.5 81.0

120.5 34.2 86.3

120.5 33.2 87.3

120.5 30.6 89.9

120.5 30.0 90.5

120.5 28.1 92.4

120.5 27.8 92.7

120.5 27.4 93.1

120.5 27.2 93.3

120.5 27.0 93.5

120.5 26.7 93.8

120.5 23.4 97.1

120.5 24.1 96.4

120.5 23.5 97.0

120.5 23.5 97.0

120.5 24.0 96.5

120.5 24.1 96.4

120.5 24.1 96.4

120.5 24.5 96.0

120.5 24.5 96.0

120.5 24.2 96.3

120.5 24.5 96.0

120.5 24.6 95.9

120.5 24.7 95.8

120.5 25.1 95.4

120.5 25.2 95.3

120.5 25.8 94.7

120.5 26.3 94.2

36

Saturation Level

(dB)

Minimum Linear

Level (dB)

Linear Dynamic

Range (dB)

12500

17.5

16000

19.5

20000

19.7

Saturation Level

(dB)

Minimum Linear

Level (dB)

Linear Dynamic

Range (dB)

20

7.3

25

5.3

31.5

2.0

40

7.9

50

9.3

63

9.1

80

10.6

100

10.6

125

11.6

160

11.9

200

12.7

250

12.8

315

12.9

400

13.5

500

13.4

630

13.6

800

13.6

1000

14.1

1250

14.8

1600

15.4

2000

16.2

2500

17.0

3150

18.0

4000

19.1

5000

20.1

6300

21.0

8000

22.4

Frequency (Hz)

Filter Linearity (High Range)

Frequency (Hz)

Noise Floor (dB)

120.5 27.0 93.5

120.5 27.6 92.9

120.5 28.3 92.2

Noise Floor (dB)

132.5 51.5 81.0

132.5 49.2 83.3

132.5 47.1 85.4

132.5 44.2 88.3

132.5 41.8 90.7

132.5 39.1 93.4

132.5 37.1 95.4

132.5 32.6 99.9

132.5 31.4 101.1

132.5 31.0 101.5

132.5 30.7 101.8

132.5 30.1 102.4

132.5 28.7 103.8

132.5 28.5 104.0

132.5 28.2 104.3

132.5 27.2 105.3

132.5 27.0 105.5

132.5 26.8 105.7

132.5 27.1 105.4

132.5 27.0 105.5

132.5 27.4 105.1

132.5 27.6 104.9

132.5 28.1 104.4

132.5 30.1 102.4

132.5 30.4 102.1

132.5 31.8 100.7

132.5 32.7 99.8

37

Saturation Level

(dB)

Minimum Linear

Level (dB)

Linear Dynamic

Range (dB)

10000

23.5

12500

25.2

16000

27.3

20000

27.7

Summation Test (Low Range Case)

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

10 100 1000 10000 100000

Frequency (Hz)

Amplitude dB

Frequency (Hz)

Noise Floor (dB)

132.5 33.5 99.0

132.5 34.1 98.4

132.5 35.8 96.7

132.5 37.1 95.4

1/3 Octave Filter Summation

For this test, sine waves from 20 Hz to 20 kHz are measured with the Concerto system. For each sine
wave the summation of the 1/3 octave filters is computed to form the following curves. The sine
waves are electrical signals at 1 VRMS. The next figures present the results for both input range.

38

Summation Test (High Range Case)

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

10 100

1000 10000 100000

Frequency (Hz)

Amplitude dB

39