PASCO CI-6506B SOUND SENSOR - Manual (Page 2)

012-06296B
2
Sound Sensor
®
➁ Open the Experiment Setup window in
Science Workshop. Click and drag the analog plug icon
to the analog channel icon that matches the analog port
you are using for the Sound Sensor (Figure 2).
Figure 2. Activating the analog channel in
Science Workshop.
Setup Procedure
A
B
Plug into
any analog
channel.
Plug into any
analog
channel.
Figure 1. Connecting the Sound Sensor into the computer
interface.
➂ Select "Sound Sensor" from the drop-down menu
(Figure 3).
➃ Open a display window, such as the Oscilloscope
display, by dragging and dropping the appropriate
display icon to the Sound Sensor icon (Figure 4).
Figure 3. Setting up the Sound Sensor in Science Workshop.
Additional Equipment Suggested:
• Tuning Forks (SE-9325 or SE-9326)
• Organ Pipe with Sliding Piston (SF-9328)
• Acoustics Demonstration Disk (SF-9410)
➀ Connect the Sound Sensor and any analog channel on
the computer interface box with interface cable
(Figure 1A),
or
insert the DIN plug of the Sound Sensor into the jack
of any analog channel on the computer interface box
(Figure 1B).
The sound level, which is measured in decibels can
be calculated from amplitude of the voltage. The for-
mula is.
B = 10 * log(A^2/A(0)^2)
Where A is the amplitude of the voltage and A(0) is
the theoretical amplitude for a sound level of 0 dB.
At a frequency of 440 Hz, A(0) = 10 ^ -4 volts ap-
proximately.
To have Data Studio perform this calculation, click on
th Calculate button and type the following equation:
sound level = 10*log(amplitude (10,10,.001, v^2)/(10^-
8).
In the Variables section of the Calculator, define v as
Voltage, Ch A.
This equation is optimized for a sine wave at 440 Hz,
so you may need to adjust the third argument of the
amplitude function (it should be about equal to the pe-
riod of the wave).
The value of 10^-4 volts is also optimized for 440 Hz.
Since the response of the sound sensor varies with
frequency, you may want to calibrate the equation for
a different frequency. To do so, you would need a
stand-alone sound level meter. Measure the sound
level of as sound (B) with the meter, and the voltage
amplitude (A) with the sound sensor. Use these val-
ues to solve for A(0) in the first equation above.
Interface 500
1 2
GAIN=1,10:ISOLATED GAIN = 1,10: REF TO GND GAIN = 1: REF TO GND
A s C
ON
ANALOG CHANNELS B n
DIGITAL CHANNELS
ScienceWorkshop ™
P R E S S T O L O G
®
SO UN D SE NS OR
CI- 65 06 B
P R E S S T O L O G
Interface 500 ®
1 2
GAIN=1,10:ISOLATED GAIN = 1,10: REF TO GND GAIN = 1: REF TO GND
A s C
ON
ANALOG CHANNELS B n
DIGITAL CHANNELS
ScienceWorkshop ™
SO UN D
SE NS OR
CI -6 50 6B