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Rhythmic chirping, ticking or beeping sounds from headphones | Bose Aviation Headset X
Determine if any recent changes have been made to the headset or aircraft.
If any changes or modifications have been made to either the headset or the aircraft, look into whether or not those changes could have unexpectedly caused this issue.
Check if the noise is affected by the volume control on the aircraft panel volume control.
Without adjusting your headset volume, turn up or down the volume control on the aircraft panel. If the noise level changes as well, the noise is related to the signal being received from the panel.
Check if the issue only occurrs during certain events.
It's possible unexpected noise might occur during certain events, like takeoff and landing. This is typically due to other electronics in the aircraft interfering with the electronics in the headset. While this isn't common, interference can occur with between electronics. If possible, determine the source of interference and if the source can be turned off, relocated or shielded from the headset.
Check if the issue only occurs at certain altitudes.
In non-pressurized aircrafts, the effectiveness of noise-cancellation decreases as the alititude increases. The headset might also produce a whining sound in these situations. For info on maximum altitude for full noise cancellation, refer to the headset specifications.
Determine if the issue occurs when your headset is powered off.
Your headset works in passive mode (powered off with no noise cancellation). If the issue still occurs while the headset is powered off, the issue is related to signal coming being received by the headset from the aircraft panel (i.e. the connections, wiring, or interference).
Determine if the tone of the noise changes when the avionics panel is touched.
If the tone changes when the avionics panel or any other area of the plane is touched, there may be a grounding issue with the aircraft or the intercom connections and associated wiring.
Connect the headset to a different panel jack or, if possible, to another aircraft.
Non-TSO equipment, worn jacks/loose connections, or incorrectly wired jacks (i.e. reversed stereo or mic / ground wires) in the aircraft can cause issues. If available, try connecting the headset to another jack in the aircraft or to jacks in a separate aircraft. If the headset works fine when connected elsewhere, the panel jack or wiring to the jack is the issue.
Replace worn ear cushions.
The issue may be caused by the lack of a proper seal by the ear cushions around the ear. Also check to be sure the cushions are securely attached to the earcup. Replacing worn ear cushions will aid in comfort, the performance of the active noise reduction and battery life
Contact an NRT technician for troubleshooting assistance.
The nature of this issue with the Aviation Headset X requires the assistance of an NRT repair technician. Contact the NRTG Repair Shop at extension 54455, Monday through Friday, 8:30AM to 5PM ET
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