Berlin, Freedom Bell
Bill Hibbert
bill at efg8q9ZRLxo3AofnJgwJMCmNYK2Q49I9yg3Zfksq34j4XH3qd7NCos7jhaDLL1tNIrsfvs8Q5mqzVF1eZHo.yahoo.invalid
Tue Jun 19 19:00:31 BST 2007
Alan, thank you so much for the prompt response and the tuning
figures. There is a good match with those I measured from the
recording. I have used some educated guesswork to interpret the
figures from the G&J records and others may be able to shed some light.
I am assuming that a figure such as 199 3/8+1/10 means that a fork
measured at 199 3/8 cycles per second beat against the relevant
partial with one beat in 10 seconds. 429 1/2+ 1 1/3 I took to mean a
fork with frequency 429 1/2 cycles per second beating at 1 1/3 beats
per second (i.e. 4 beats in 3 seconds).
With this as background the figures that line up are as follows:
G&J Recording
82.1 86.8 (hum)
165 151.9 (prime)
199.5 198.1 (tierce)
355.2 334.4 (nominal - the G&J figure should be 335.2!)
504.2 502.5 (superquint)
699.8 694.9 (octave nominal)
916.9 910.8 (I-7)
1142.3 1138.6 (I-8)
1388.5 1382.2 (I-9).
Some comments on these figures:
* the recorder used was running 0.5% slow
* the G&J figure for the nominal is in error, 355Hz is an F, not an E
* G&J struggled to measure the very low frequencies for hum and prime
using forks and I am not surprised.
I do not know the significance of the second batch of figures,
starting 731 LW&W.95&CR.
Thanks again for the figures, they confirm that this is definitely a
recording of the right bell.
Regards,
Bill H
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