Pilots can mute an audio signal when an IC/intercommunications signal is detected, or mix in-bound IC/intercommunications signals with the Bluetooth ® or wired audio signal. There are two prioritization settings - Mute or Mixed - accessible via the headset’s control module. The Bose A20 ® headset now includes an updated customizable audio prioritization feature so pilots have full control of what audio source they hear, and how they want to hear it. For devices without Bluetooth functionality, the headset includes a wired auxiliary audio input. Owners can also stream music via the Bluetooth audio function for unprecedented in-flight music listening with Bose audio quality. Through expanded Bluetooth audio and communications capabilities, pilots can now wirelessly stream warnings and advisories from popular aviation apps from their mobile device. The Bose A20 ® Aviation Headset now includes Bluetooth audio. The A20 remains unbeatable for performance and functionality.” “We’ve added features to our iconic aviation headset for one reason: to make flying better for every pilot who chooses Bose. “We’ve never stopped trying to make a better headset,” said Sean Garrett, Vice President of Consumer Electronics Product Engineering at Bose Corporation. Recognized globally as the industry standard for active noise reduction, comfort and clear audio, the A20 ® headset has been updated with Bluetooth audio, customizable audio prioritization, flexible power with auto-on capability (for select headset variants), and a coil cord cable for helicopter pilots. Bose announced enhanced features to its award-winning Bose A20 ® Aviation Headset - its best-performing, most advanced aviation headset ever. ^ "What is an ETSO approval and where can I find the corresponding regulations?".^ "Technical Information on Clarity Aloft® Aviation Headsets - Clarity Aloft".^ "Cable Adapters, Aviation, for NeutriCON Headsets".^ "FL20-P - Commercial aviation headset by FACTEM | AeroExpo".^ "A20® BLUETOOTH® headset cable, 6-pin plug".^ "British Aircrew 671-Type Plug / NATO Plug".^ a b c d "Bose A20 Aviation Headset Owner's Guide" (PDF).^ a b c "What the PLUG! A Guide to Aviation Headset Plugs".Again, this is not mandatory but may optionally be required by an airline. The TSO for aviation headsets is ETSO-C139. In Europe, the European Union Aviation Safety Agency (EASA) also issues TSOs. This is a choice by the airline, not an FAA requirement. Some commercial airlines require the use of TSO-compliant headsets, as part of their operations manual. The TSO for aviation headsets is C139, which includes requirements to withstand extreme heat and cold, decompression, and electromagnetic interference. In the United States, the Federal Aviation Administration (FAA) issues Technical Standard Orders (TSOs) regarding equipment used on civil aircraft. The XLR, LEMO and Fischer plugs are able to supply power for active noise cancellation. Fischer 8-pin connector, used in Agusta helicopters.REDEL 6-pin connector by LEMO, known as "LEMO plugs".XLR 5, used internally on Airbus aircraft.Type 671, also known as UK NATO or European NATO 10H/18575, with a diameter of 7.57 mm (0.298 in).U-384/U (Nexus TP-105), similar to U-174/U but with 5 conductors and slightly longer length of 0.901 in (22.9 mm).The TP-120 (also known as J11) is standard for external jack plugs on most Boeing and Airbus airliners, used by ground-crew U-174/U (Nexus TP-101), U-93A/U (Nexus TP-102), and Nexus TP-120, also known as US NATO, commonly used in helicopters, with a diameter of 0.281 in (7.1 mm) and length 0.761 in (19.3 mm).1/4-inch plug for audio, and a 3/16-inch plug for the microphone A pair of plugs, known as "GA" or general aviation plugs. The following electrical connectors are commonly used in aviation headsets: "NATO" plug type, commonly used on military aircraft and civil helicopters
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