"Keith Willshaw" wrote in message ...
The equipment used was apparently restricted to the range
60 Hz to 4500 Hz
The microphones and interphone equipment, on the other hand, had a
frequency response of roughly 300-3000 Hz. Depending on the type of
microphone used (T-17, T-44, British HI, or a zillion others - the
Station Boxes (probably Bendix MI-22s) could handle lots of different
types of microphones), the response characteristics might be a little
different, but not much. The interphone amplifier likely also has a
filter to supress anything out of the 300-3000 Hz range. There were
noise cancelling mikes back then, but they were not very good.
Did someone mention a disc recorder being used? Frankly, I can not
think of anything worse to take on a big bomber. The virbrations from
the engines would go right thru to the cutting head mechanically, even
with a good shockmount.
--
William Donzelli
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