PASCO PS-2109 User Manual
Sound Level Sensor
Connector
Sound Level
Sensor
Microphone
1/4-20 threaded
hole
Range Selection
Buttons
Sensor
Mounting
Stud
PS-2109
Instruction Sheet
012-08204B
.
Included Items
Sound Level Sensor
Sensor Mounting Stud (CI-9874, four pack)
Required Items*
PASCO Interface
PASCO Data Acquisition Software
*See the PASCO catalog or the PASCO web site at www.pasco.com
for more information.
Other Item*
PASPORT Sensor Extension Cable PS-2500
Introduction
The PS-2109 Sound Level Sensor measures both sound level
in decibels and sound intensity in microwatts per square
meter. The sensor measures sound level in both the dBA
weighting scale (matching the sensitivity of the ear) and the
dBC weighting scale (equal response to all frequencies). The
sensor has three selectable sound level ranges. The sensor is
designed to measure sound levels of sources within 10 feet
(3.04 m).
The sensor includes a Sensor Mounting Stud that can serve
as a handle or mounting rod when it is screwed into the
1/4-20 threaded hole on the side of the sensor box. The
non-threaded end of the stud fits on the shaft of a PASCO
Rotary Motion Sensor.
The sensor is designed to work with a PASPORT-compatible
interface (such as the UI-5100 850 Universal Interface) and
PASCO data acquisition software (such as PASCO Capstone
or SPARKvue) to measure sound level and sound intensity.
Sensor Setup
• Plug the sensor into a PASPORT input port of a PASCO
interface.
NOTE: If more distance is needed between the sensor and
the interface, plug the sensor into a Sensor Extension Cable
(PS-2500), and then plug the cable into the interface.
Sound Level Sensor Specifications
Sensor
PASPORT
Input Port
Interface
Visibility
icon
Touch a
measurement
Touch “Show”
Using Xplorer GLX Datalogger
• When you connect the sensor to the Xplorer GLX Datalogger, a Digits display of Sound Level (dBC) and
Sound Intensity automatically opens.
• Start the PASCO data acquisition software. Set up a data
display in the software.
Using PASCO Capstone Software
• Click the “Data Summary” icon in the Tools palette to
open the “Data Summary” panel. Click the “Visibility”
icon to see the list of measurements that are visible by
default.
Select the Range
Press one of the buttons (Voice, Horn, Plane) on the top of
the sensor to select the Sound Level and Sound Intensity
Range. A green light emitting diode (LED) in the button will
illuminate.
• Click one of the display templates in the Capstone workbook page, or double-click an icon in the “Displays”
palette to select a specific data display.
Using SPARKvue Software
• Connect the sensor to a SPARK Science device and start
the software. In SPARKvue, the sensor parameter screen
opens and shows the list of measurements for the sensor.
• In the sensor parameter screen, touch a measurement to
highlight it, and then touch ‘Show’ to open a graph display.
Record Data
• Click “Record”, touch ‘Start’, or press the ‘Record’ button to begin recording data.
Specifications
Item Value
Sound Level Range:
(dBC and dBA)
Sound Intensity Range:
Accuracy: ±2 dB at 94 dB (or dBC) at 1 kHz
Resolution: 0.1 dB
Repeatability: 0.1 dB
Sound Scales
Sound Level dBC: The dBC weighting scale corresponds to
the total sound level generated by a diffracted sound emission, such s from machinery, a motor, or a plane at take off.
The dBC displays a wider frequency spectrum than the dBA
weighting scale because, unlike the dBA scale, the noise is
not filtered.
Voice: 30 to 70 decibels
Horn: 50 to 90 decibels
Plane: 70 to 110 decibels
Voice: 0.001 to 10 W/m
Horn: 1 to 1000 W/m
Plane: 10 to 10,000 W/m
2
2
2
2
Sound Level dBA: The dBA weighting scale filters some of
the sound frequencies from a sound source to more closely
match the frequency response of the human ear. The dBA
scale is commonly used in the workplace to determine the
sound level and employee will experience in typical working
conditions.
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