Template:UgSoundSensor

Sound Pressure Level Sensor

When you double click on a Sound Sensor object, a window like the one pictured will open.

• In the top-left of the window, information about your device and the properties of this particular channel will be listed.
• On the left, change trigger and/or data interval can be changed. For more information on these settings, see the Data Rate/Change Trigger page. You can also select between two different SPL ranges. Always select the lowest possible range that the level of sound you're measuring will fall within, as smaller ranges have higher resolution.
• On the bottom-left, you can push a button to make your computer's speakers emit a 2.5 second beep of a certain frequency. If you do this while holding the sound sensor near the speaker, you can test if it's detecting the sound and its frequency correctly.
• In the middle of the window, you can see numbers for the current SPL readings. For information on the difference between dB, dBA and dBC, see the technical section.
• On the right, there's a live graph of the sound detected by the sensor. Each bar represents a certain frequency band, labelled on the top, and the size of the bar and the number on the bottom represent that frequency's magnitude. Try using the speaker beep or your own voice to test the frequency detection.