Question 1

My BOSE QuietComfort Ultra headphones show as connected but there's no sound - how can I fix this?

Accepted Answer

If your BOSE QuietComfort Ultra headphones appear connected via Bluetooth but no sound is coming out, several factors may be the cause. Try these solutions in order:

Check the fit and insertion: Use a mirror to ensure that the ear tips are properly seated at the entrance of your ear canal and that the stability bands fit well against your ear. Make sure your head is straight during insertion and that the tips are not pushed too far in or tilted back, as this affects sound quality and may create a poor seal. If needed, try a different size of tip or band (the headphones come with three sizes: small, medium, and large). You can also use the seal fit test available in the Bose Music app (Settings menu) to check the fit.

Increase the volume: Swipe up on the touch surface of the headphones to increase the volume. The volume may be set to minimum, which would prevent sound from coming out even if the connection is active. Also, increase the volume on your source device (phone, tablet, or computer) and within the music app itself.

Check the audio output: Ensure that the BOSE QuietComfort Ultra Headphones are selected as the main audio output device in your device's Bluetooth menu. Sound may sometimes be routed to another device (phone speaker, another headset, etc.).

Test with different audio sources: Press 'Play' on your mobile device to confirm that audio starts playing. Try playing music from a different app or service. Also, play audio content stored directly on your device rather than streaming content.

Clean the headphones: Clean the ear tips and nozzles of the headphones with a dry cotton swab to remove any debris or wax buildup that may be blocking the sound. Refer to the manual for cleaning details.

Disable in-ear detection: Open the Bose Music app and go to the Settings menu. Temporarily disable the in-ear detection features (auto play, auto answer calls) that may interfere with audio playback.

Perform a full restart: Restart your mobile device. Then place both headphones in the case until you hear a magnetic 'click', close and then reopen the case. Reconnect the headphones to your device via the Bose Music app or the Bluetooth menu.

If none of these solutions work, contact Bose customer service or visit the help section at support.Bose.com/QCUE for further troubleshooting.

Question 2

What technologies are used in the Bose A30 Aviation headset?

Accepted Answer

The Bose A30 Aviation headset incorporates a set of advanced technologies specifically designed for aviation professionals:

Active Noise Cancelling: The system offers a full attenuation range of up to 115 dB SPL and a reduced range of up to 134 dB SPL. Noise cancelling operates in two modes: when the device is on for active attenuation, and when it is off for passive ambient noise attenuation. This system can be adjusted to three levels (OFF, LOW, and HIGH) to tailor the reduction to your preference and sound environment.

Passive Noise Reduction: Even without power, the headset continues to provide passive attenuation of typical aviation noises (engines, propellers, alarms). This technology relies on an optimized acoustic design of the earcup.

Electret Microphone with Articulated Boom: The boom microphone can pivot 160 degrees and uses electret technology for exceptional voice transmission. It should be positioned 12.7 mm (0.5 inches) from your lips, with the white dot on the microphone base facing your mouth to ensure clear communications and reduce background noise.

Multiple Connectivity: The A30 connects via several aviation-compatible options: dual plug (general aviation), U174 connector, 5-pin XLR, 6-pin Lemo, wireless Bluetooth (2400-2483.5 MHz band), and 3.5 mm AUX cable. The aviation connectors provide both aircraft power (10-32V) and intercom audio.

Tap Control Function: This technology allows you to adjust the noise attenuation to LOW on one earcup for interpersonal conversations, while the other maintains full level, without removing the headset.

Extended Battery Life: In Bluetooth mode, the headset offers a battery life of 45 hours, allowing for several days of use in light or commercial aviation. The system can also operate on direct aircraft power via the aviation connectors.

Lightweight and Ergonomic Construction: Weighing approximately 340 grams, the headset features cushioned earcups and an adjustable headband for maximum comfort during extended flights, in accordance with aviation safety standards (TSO).

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