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The audiometers in Booths B, E, F & G have external inputs which are fed from an Audiometer Aux Switcher which allow CD, iPod & PC external sources to be presented to the test subject.

 

 

In Booths F & G, the Researcher PC has a 2-channel Focusrite Scarlett 2i2 USB soundcard. This device is capable of recording up to (2) mic or line sources and playing back up to (2) channels of audio.

Using the Researcher PC, you can present audio stimuli from any program or website. This document will outline how to use a media player called Foobar 2000 to present standard audio tests to a subject.

 

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Power on the equipment in your booth. Instructions here. 

Press CTRL-ALT-DELETE.

On the login screen, click the red arrow in the bottom right corner and choose RESTART

 

Once the machine has restarted, log into the PC using your EID & password.

Launch Foobar2000 using the icon on your desktop or by clicking Start > All Programs > Foobar2000

Select PC on the audiometer aux switcher. Note that the volume knob on this switcher has been disabled and does not affect output volume.

photo of rack w/ arrow highlighting audiometer aux switcher

closeup photo of switcher w/ arrow indicating PC button; note that volume knob disabled & does not affect volume.

Select External Input as your source on the audiometer.

~ Input Ext A corresponds with the Left output from your device.

~ Input Ext B corresponds with the Right output from your device.

Confirm that the large knob on the Focusrite USB Soundcard is set to maximum volume. 

 

In the left-hand folder browser in Foobar, navigate to the test media you wish to present.

Drag the test media to the Default Playlist.

Double click on a file in the playlist to begin playing it.

screen cap illustrating folder structure w/ arrow of content being dragged to playlist

Find the calibration tone for the test media you are going to present and use it to calibrate the audiometer's external input trims.

 
Test and confirm all transducers are working prior to your test subject's arrival. 

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You can drag elements in your playlist to order them most appropriately for your session.

 
Use the transport controls at the top of Foobar to stop, play, & pause the playback of files.
Use the scrub bar at the top of Foobar to jump to a different part of a track.
  

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Log out of the PC. Please do NOT shut it down. 

Power off the equipment in your booth. Instructions here.

 
 

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