For the latest updates on OCM's preparations for COVID-19, please see our 2020-21 explanations and guidelines.


Microphones are available in select classrooms. To locate a classroom with a microphone installed, use Room Search and filter by selecting “Instructor Microphone” as a feature.

Microphones are typically found inside a drawer at the instructor station.

The volume of audio from a classroom microphone is not adjustable. The projection system “Audio Mute” and volume controls do not affect microphone volume. This way the system performs consistently for all speakers.

Photo of open drawer with microphones in charging station

Using a rechargeable wireless microphone

Two wireless microphones
  1. Locate the microphone in the charging base at the instructor station. The charging base may be in a drawer.
  2. Remove the microphone from the charging base and clip it to your clothing, about three inches below your chin. If you’d like to use a lanyard and none are found in the drawer, you can request one by emailing
  3. Press the button on the microphone to unmute or mute the microphone.

If you travel more than 65 feet from the charging base, the unit will turn off and emit an alarm beep to alert you to return the microphone to its charging base.

Return the microphone to the charging base to ensure that it remains charged for the next instructor.

Charging information and status lights

If a microphone needs to be charged, place it back in the charger for a minimum of 15-20 minutes. If both microphones are depleted, place them back in the charger and swap them out as the new charge is depleted.

The LED indicator light on the top of the microphone will indicate its status:

  • If it is blinking red, press the side button to unmute it.

  • If it is solid red, the microphone is usable but not fully charged.

  • If it is green, the microphone is charged and on.

  • If it is blinking yellow/green, the battery is low.

  • If it is blinking with any other combination of colors, there is a problem with the microphone.

Microphone replacement

We do not have an extra stock of charged microphones available for immediate use.

If a microphone is broken or missing, call the Classroom Support Hotline (612-625-1086) to dispatch a replacement. There will be a delay while a technician installs the new microphone.

Troubleshooting tips

  • Since volume is not user adjustable, reposition the microphone using the clip on your clothing to increase or decrease volume.

  • If a rechargeable microphone is not working properly, first try using the second microphone.

If you have questions or issues, contact the Classroom Support Hotline at 612-625-1086 or For the fastest service, use the phone in the room if available.