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Hello everyone;
Attached is a frequency response plot of both the old acoustic machines and
the newer Orthophonic acoustic talking machines.
I don't know the source or validity of this plot but it does seem reasonable
to me.

Anyone know anything about this plot?

Ron Roscoe
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-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]] On Behalf Of Steve Smolian
Sent: Monday, June 25, 2018 9:38 PM
To: [log in to unmask]
Subject: [ARSCLIST] Acoustic frequency range

Has anyone measured the frequency range of acoustic records?


I seem to recall George Brock-Nannastadt published this info somewhere but
can't locate it.


Also, has anyone his email address?  He's not in the ARSC directory.


Steve Smolian