What do Halo Sport's different tones indicate?

Halo Sport has 4 different types of beeps that come from the right ear cup: 

1. Neuropriming Started / Resumed - A short 2 tone beep 

2. Neuropriming Completed - A short 4 tone beep 

3. Poor contact - Three beeps (same tone) in a row, followed by a break, then the same three beeps. Beeping will continue until poor contact is fixed or 5 minutes have elapsed (Neuropriming session will end). This is accompanied by a blinking yellow light.

4. System error - A short 3 tone beep accompanied by a red flashing light.

The complete definitions of Halo Sport's tones can be found in the Owner's Guide on page 11.

key words: beeps, alarm, alarms, notifications, bleep, bleeps, ring, ringing, sound, sounds