Snow
Pilot over-ride it seems. Check this.
"A number of audible information inputs we get while operating the A320, while designed with the intent of providing us useful info, have two problems: 1) we cannot 'cancel' the aural input after we are aware of it (much like pushing a master caution lite 'out' after understanding the cause) and 2) the volume level is not adjustable and its too loud. I believe that the whole point of an audio callout is to give me information, but that once I receive this info, I should be able to cancel such input, and I should be able to control-modify-stop the transmission of this info at will." (A320 Captain)
"The Albreastude Alert Warning horns and emphasized the TCAS Warning horns that send the tone through our headsets (as opposed to the overhead speaker) are way too loud. Not only is it painful to the ear, it makes it impossible to hear ATC's directions, etc. this is true for about 70-80% of 737-300s using this configuration. Solution: Simply turn down the volume or emphasized reroute the tone to the overhead speakers." (B737 Captain)
"TCAS aural commands being sounded over headset while ATC could be trying to relay information or trying to communicate with other crew member." (B737 Captain)
Graham
