PASCO Xplorer GLX, Руководство пользователя

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58 S e n s o r s S c r e e n
F3 Microphone
The Microphone menu contains options for setting how the GLX uses its built-in
microphone. The selected option is indicated by a check mark (
) appearing
next to it in the menu.
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Sound Sensor When Sound Sensor is selected, the GLX’s microphone
becomes a sensor that collects data showing the waveform of sound. The sound
sensor appears in the upper part of the Sensors screen, just like any other sensor.
Like other sensors, the Sound Sensor settings include Sample Rate Unit, Sample
Rate, and Reduce/Smooth Averaging; however you typically would not change
any of these settings because the sample rate is automatically set by the Graph in
Scope Mode.
The Sensitivity setting sets the gain of the Sound Sensor.
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For very loud sounds
set the Sensitivity lower; for softer sounds, set it higher. To make the Sound Sen-
sor automatically adjust its sensitivity based on the loudness of the sounds that it
detects, set the Sensitivity to Automatic.
The Sound Sensor is most commonly used with the Graph display in Scope
mode. Press
and together to go to the Graph display. Then press
to open the Graphs menu, and press to select Scope mode. Press . Whis-
tle or hum; you will see sound wave in the Graph. (See page 22 for more infor-
mation on Scope mode.)
Sound Level When Sound Level is selected, the GLX’s microphone measures
the loudness of sound in decibels (on the dBA scale).
The Sound Level sensor operates at a much lower sampling rate than the Sound
Sensor. Like most other sensors, you would normally use the Sound Level sensor
in continuous or manual sampling mode (see page 57), not in Scope mode.
Audio Notes With this default setting, the microphone is configured to record
the audio portion of data notes (see “Data Annotation” on page 25). If you have
previously recorded sound-sensor or sound level data, selecting Audio Notes is
equivalent to unplugging the Sound or Sound Level sensor. The GLX will pre-
serve any sound data sets that have been recorded, but it will not collect new data
from the microphone.
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To select an option from the
Microphone menu
Keypad
1. Press to open the menu.
2. Use the arrow keys to highlight the
desired menu option and press ;
or
press the number on the keypad
corresponding to the desired option.
Mouse
1. Click Microphone to open the menu.
2. Click the desired option.
F3
Microphone
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To change the Sensitivity
Keypad
1. Use the arrow keys to highlight
Sensitivity.
2. Press to open the menu.
3. Use the arrow keys to highlight the
desired setting and press ; or
press the number on the keypad cor-
responding to the desired setting.
or
1. Use the arrow keys to highlight
Sensitivity.
2. Press or to increase or
decrease the value.
Mouse
1. Click box to the right of Sensitivity to
open the menu.
2. Click the desired setting.
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F1 F4
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