Hi again, 
few thoughts
resonant, peak frequency vs length of the stick? The cilia have many 
sensors each responsible for a narrow range of frequency.


Τη Τετάρτη, 14 Μαΐου 2014 7:05:49 μ.μ. UTC+3, ο χρήστης John Dawes έγραψε:
>
>  
>  
> I have attached here a photo of the device used to make recordings of the 
> Hum.
>
> The light source is a small Lazar and the cell is a photo resister.
>
>  
>
> The device must be mounted on a substantial base, I have used here a 
> marble block making a total base mass of 800 gms and with advantage this 
> could be increased.  
>
> On Tuesday, March 18, 2014 10:28:24 AM UTC, John Dawes wrote:
>
>>  I have posted here a recording of the Hum made on Tuesday March 18 at 
>> 9am.
>> Once again I would remind that this may not sound exactly like the Hum 
>> for it is not a sound recording, that is, it was not made using airborne 
>> sound waves.
>> If the file is opened in suitable software. Like Audacity, and expanded 
>> the modulation pulses are clearly visible and the question remains, are 
>> these pulses the product of natural phenomena or man made.
>>  Audacity is available as freeware.
>>
>>

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