Posted by Jeff (216.12.51.123) on October 25, 2003 at 19:00:33:
In Reply to: Re: Sounds posted by John Collins on October 25, 2003 at 10:26:35:
John,
Thanks for the reply. I have a metronome that sounds out 208 beats per minute. It is fast.
Do you not find it surprising that the sounds of 8 weights falling per revolution was only of the two-directional wheel? I believe in your book (I have loaned my copy out) you said the viewers of the first wheels described scratching noises, but nothing was said of the sounds of weights striking the side. Certainly if they could hear scratching sounds they would have been able to hear 8 beats per revolution. Could the 8 beats have been caused by the backwards spinning of the duplicate device in the two-directional wheel? What I mean is, the one-directional wheel turning forwards made scratching noises, but if it was turned backwards by hand, maybe it would have made 8 beats per revolution.
Jeff
: Hi Jeff,
: In my book I described the sound roughly as follows. Instead of 26 rpm assume 30 rpm. One revolution therefore every two seconds. Eight beats per revolution therefore 4 weights per second. Count out seconds by marking time saying one for each second then try counting to four in the one second gaps! Fast isn't it!
: John C.
:
: : Hi Scott & All,
: :
: : Regarding the two direction machine: About 8 weights were heard to strike the side per revolution and the unloaded rpm was 26. It would probably not help with a solution, but it might be fun to listen to an audio file (wav) of 208 beats per minute. Maybe Scott or one of the readers could make and post such a file.
: :
: : Jeff