PPRuNe Forums - View Single Post - ADF ident audio frequency?

7th November 2009 | 03:22

#9 (permalink)

Loose rivets

Psychophysiological entity

Joined: Jun 2001

: ATPL

Posts: 3,383

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From: Walton on the Naze Essex.

Yes, I recall hearing the very first DME idents. Even to my young ears it seemed very high after the melodious 400 cps. Oh, okay, Hertz.

Take the middle C on a piano and the A above it. Your 400 Hz will be very roughly between the two.

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