SINUS Boogie 904001.2 User Manual

Declaration of Conformity

We, SINUS Messtechnik GmbH, Foepplstrasse 13, 04347 Leipzig,
Germany, declare that the product

Boogie Sound Level Meter

Part Number: 904001.2

to which this declaration relates, is in conformity with the following
European standards and other documents:

Specification complies with: IEC 60651, type 2
IEC 60804, type 2

EMC EN 50051-1
EN 50082-1

This product has been manufactured in compliance with the following
internal documentation for manufacture and quality assurance from
SINUS Messtechnik GmbH:

Manufacturing documents - Quality assurance manual conforming

to ISO 9001

- Testing rules for Electronic Boards

- Testing rules for Final Test

This product was tested and found to comply with all specifications.

Leipzig, August 2003 Gunther Papsdorf
Managing Director

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Manual

Mini – Sound Level Meter

Boogie

™

 Thank you for purchasing the Boogie sound level meter from

SINUS Messtechnik GmbH.



Please read this manual carefully before using the sound level
meter. We advise practicing with some test measurements before
performing important measurements.



If you should have any questions on the operation or the
application of the instrument please do not hesitate to contact us.
You can also order our current catalog and spare parts from the
address below.

Address: SINUS Messtechnik GmbH

Foepplstrasse 13
04347 Leipzig

FON: [phone]
FAX: [phone]

Email: [e-mail]

Boogie and Soundbook are registered trade marks of SINUS Messtechnik GmbH.

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Some Fundamentals of Sound

Audible sound is caused by barometric fluctuations in the freqency
range from 16 to 16,000 cycles per second (16 Hz... 16kHz). These
fluctuations are measured in the physical unit Pascal (Pa). The human
ear can recognize sound pressures in the range from about 0.00002 Pa
(threshold of hearing) to 100 Pa (threshold of pain). Due to this
extremely wide range, a logarithmic measure – the decibel (dB) – is
used for clarity. The dB value for the audibility threshold is 0 dB and for
the pain threshold 140 dB.

The sensitivity of the human ear is frequency-dependent. Our ear is
less sensitive to very low and very high frequencies than to middle
frequencies (1 kHz). This characteristic of the human ear is simulated
by the so-called A-filter in sound level meters. Many acoustic
measurements such as traffic noise measurements are performed with
A-weighted levels. The measured values are usually labeled with the
suffix (A), e.g. 65 dB (A).
For measuring annoyance or even damage to hearing, a so-called
average level is important in addition to the maximum sound level. This
average level or “equivalent continuous sound pressure level” L

eq

is
used for evaluating heavily fluctuating levels.
When evaluating with Leq it must be considered that it does not take
into account properties of sound that are perceived differently by
different people. Thus, aircraft noise is often perceived to be more
annoying than railroad noise and truck noise more annoying than
motorcycle noise.
The reason for this is the different frequency distribution of sounds.
When calculating levels, these properties can be taken into account by
means of standard additions and reductions without the need to
calculate frequency spectra.
Due to the logarithmic graduation of the dB-scale, two sound sources of
the same loudness cause together exactly 3 dB more noise than each
of them alone. The apparently paradoxical statement that
0 dB + 0 dB = 3 dB becomes understandable when bearing in mind that
0 dB does not correspond to 0 Pa, but to the human threshold of
hearing.
A level shift of 3dB can just about be perceived by the human ear; a
level reduction of 10 dB is necessary in order to halve the perceived
loudness.

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Equivalent Continuous Sound Level

This operating mode displays the equivalent continuous sound level
(L

eq

) over a given measurement period. The measurement is started
and stopped with [SET], as for the maximum sound level mode. The
measurement range must be selected before the measurement is
started. During the measurement period the digital display shows the
short-time L

eq

over 1 s. After finishing the measurement, the Leq for the
measurement period is shown; if an overload occurred during the
measurement, this is indicated by the arrow symbol.

Tip: In order to find the most suitable measurement range

for L

pmax

or Leq, a preliminary measurement should be

made with Auto-range in the L

p

operating mode.

Technical Data

Accuracy Type 2 according to IEC 60651 / 60804
Measurement range 30 ... 130 dB (A)
Operating modes - Sound level L

p

- Maximum sound level L

pmax

- Equivalent continuous sound level L

eq

Level ranges 30 ... 90 dB
50 ... 110 dB
70 ... 130 dB
Autorange in Lp mode
Frequency weighting A
Time weighting Fast
Display - Measured value with 3.5 digits

- Bar graph in 5 dB steps

- under-range andover-range indicator

- Operating mode, measurement range

- Battery status
Microphone ¼” electret
Calibration Automatic to 93.5 ... 94.5 dB
(use 93,9 dB with 511E calibrator)
Batteries 2 x R6, alkaline, NiMh, NiCd
Operating time 100 h (alkaline batteries)
Dimensions 170 mm x 62 mm x 30 mm
Weight 160 g (with batteries)

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For certain situations, medical specialists and legislation have laid
down limits for the acceptable continuous sound pressure level L

eq

(A) .
When new roads or railroads are planned, these rules must be
complied with. For example, in German residential areas, noise levels
of 65 dB (A) during the day and 55 dB (A) at night must not be
exceeded. The WHO even recommends lower values of only 55 dB (A)
during the day and 45 dB (A) at night. These values are often grossly
exceeded in many places in Germany and other highly industrialized
countries.
Exposure to a continuous sound pressure level of more than 85 dB is
considered to be a health risk. Literature references about sound can
be found under

www.sinusmess.de.

Sound Level Measurement with Boogie

Boogie enables you to measure sound levels easily and to assess them
objectively. The instrument is easy to operate because of the built-in
microprocessor which allows Boogie to be employed even by
inexperienced users.
Boogie always works with a built-in A-filter and the time weighting
"Fast". In addition to the instantaneous value of the sound level L

p

and

the maximum value L

pmax

in a time period, Boogie can also measure

L

eq

by integrating over a time period. This mode of operation is usually
only found in bigger and more expensive instruments.
Therefore, Boogie is the ideal instrument for measuring:

• traffic noise

• industrial noise

• neighborhood noise

• leisure noise

• occupational noise

Type 2 accuracy according to IEC 60651 and IEC 60804 guarantees
reliable measurement results for the user. The accuracy of
measurements can be considerably increased by calibrating the
instrument before performing the measurements.
Boogie can not be used for legally binding measurements in Germany
because legislation stipulates that for this type of measurements a
calibrated sound level meter of type 1 must be used.
However, modern type 2 devices such as Boogie provide measurement
results exact enough for assessing noise situations in many cases.

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The [SET] button starts and stops all measurements except Lp.

Calibration

For calibration, a ¼” calibrator with a nominal level of 94 dB must be
attached. After choosing the CAL operating mode, the expected level of
94 dB is shown

. Please note that the ¼” adapter of the calibrator in

connection with our microphone causes a slight shift in the sound level

.
By repeatedly pressing the [RANGE] button, the actual level of the
calibrator can be set within the range 93.5 dB to 94.5 dB in 0.1 dB
steps. The calibration is then started with [SET]. The mode display CAL
blinks during the calibration and stops blinking when the calibration is
finished.
The calibration is stored with [SET]; the calibration values also remain
stored in the instrument when it is switched off.
All instruments are shipped calibrated ex works.

Instantaneous Sound Level

In the instantaneous sound level (L

p

) operating mode, it is possible to
choose between automatic (indicated by AUTO) and manual setting of
the measurement range by repeatedly pressing the [RANGE] button.
The selected measurement range is indicated by the limit values of the
bar graph.
When the selected measurement range is not within these limits, no
measurement value is displayed. This is indicated by the arrows =
under-range indicator and = over-range indicator.

Maximum Sound Level

In this operating mode the maximum value of the instantaneous sound
level (L

pmax

) within a measurement period is calculated. The start and
end of the measurement period are set by pressing the [SET] button.
Before beginning the measurement, the desired measurement range
must be selected with the [RANGE] button. During a measurement
period, the bar graph shows the instantaneous value of the sound level
and the digital display indicates the current maximum value. After
stopping the measurement with [SET], the maximum value remains
visible. If an overload occurs during the measuring time, it will be
indicated again after stopping the measurement, in which case the
measurement is invalid.

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Delivery

When unpacking, please check that the following items are present:

- Boogie sound level meter

- W3 windscreen

- 2x R6 batteries

- Instruction manual

- Packing carton (can be used for storage)

Please contact your dealer immediately if any item is missing.

Optional accessories:

Windscreen 800254.7
Hand strap 800480.5
Batteries 800479.0
¼“ calibrator 511E 800351.5

¼“ microphone

2 x R6 battery (at rear)

LC-display

[SET] button

[RANGE] button

[MODE/POWER] button

¼“ mounting thread

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Preparing for Measurement

After unpacking the unit the 2xR6 batteries must be inserted. Pay
attention to the correct polarity when inserting the batteries.

However, a wrongly inserted battery will not cause any damage.

As an optional accessory, a hand strap is available to prevent the unit
from accidentally being dropped during longer measurements. Boogie
is a precision measuring instrument and should always be handled with
care. In particular, the microphone and the display are sensitive
components.
For outdoor measurements, the windscreen should be placed over the
microphone to reduce wind noise, which may otherwise produce false
measurement results.
If a calibrator is available, the instrument should be calibrated before
each measurement and ideally the sensitivity should be checked again
with the calibrator after each measurement.
Either primary cells (alkaline, zinc-carbon) or rechargeable batteries
(NiCd, NiMh) of R6 (AA) format can be used. The ultra low power
technology of the built-in microprocessor allows an extremely long
operating time with a single set of batteries.
However, the batteries should be removed from the unit if it is not to be
used for three months or longer: discharged batteries may leak and the
leaking electrolyte can cause damage to the instrument.

Operation

Function of Buttons

The instrument is switched on / off by holding the [MODE/POWER]
button pressed for longer than one second. After switching on, a
functional test of the display is performed, i.e. all segments of the
display are visible simultaneously for a short time.
Afterwards the instrument is in the Lpand Autorange operating mode,
which is indicated by AUTO.
The measurement range can be selected by pressing the [RANGE]
button. The minimum and maximum values of the current range are
displayed in the bar graph.
The [MODE] button changes the

mode. The current operating mode is

shown in the display:

AUTO = Lp with Autorange
MAX = L

pmax

LEQ = L

eq

CAL = calibration

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