User guide for check_audioLevels

This page gives a brief explanation on how to use the check_audioLevels function in MATLAB

This command should be used before the participant arrives AND with the participant before you run the experiment.
Before the participant arrives:

  • Run check_audioLevels in MATLAB
  • Select choice a) that the mic and headphones are working, then check background noise levels (before participant arrives)
  • Put on mic and headphones and speak
  • Make sure you can hear your voice through the headphones
  • Press space to continue
  • The next screen will tell you to make sure the headphones are plugged in to the correct output of the headphone amplifier *  
  • Use the audiometer/SPL meter to check the noise level
    • The settings of the SPL meter should be set to: **
      • No max or min
      • A mode
      • Slow
      • Level 50-100 db
    • Take the foam cover off of the SPL meter and place it inside the headphones
    • The noise level should be about 60 db
    • If it is not, adjust the appropriate headphone output knob on the headphone amplifier


Once you are ready to run the experiment:

    • Run check_audioLevels in MATLAB
    • Select b) the microphone level with the participant
    • First, it will tell you to make sure the headphones are plugged in to the correct output of the headphone amplifier *

    • Use the audiometer/SPL meter to check the noise level
      • The settings of the SPL meter should be set to: **
        • No max or min
        • A mode
        • Slow
        • Level 50-100 db

    • Take the foam cover off of the SPL meter and place it inside the headphones
    • Have the participant sustain the word "head" at a comfortable volume
    • The noise level should be about 80 db
    • If it is not, adjust the microphone gain (black knob) ***
 
* (headphone amplifier outputs)
 
** (correct settings for the SPL meter)
*** (microphone gain)




Keywords:check_audioLevels, MATLAB, headphones, microphone, check, audio, SPL meter, audiometer   Doc ID:89821
Owner:Chris N.Group:Speech Motor Neuroscience Group
Created:2019-02-19 11:56 CSTUpdated:2022-09-19 14:44 CST
Sites:Speech Motor Neuroscience Group
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