[Asterisk-Users] Woodpeckers

[Matt Lawson]

The low "B" string on a 5-string bass guitar is approx. 31 Hz....


>>
>>> A power spectrum plot will tell him he has a 60Hz hum. I think he 
>>> already knows that. I think he can definitely consider solutions
>>> without 
>>> following your suggestion. :-)
>>    
>>

> No,  It's not a "60Hz hum".  Yes, 60Hz is getting into the line
>but the existing filters are removing the 60hz.  What he hears
>is most likely 120Hz, 240Hz or something else or most likely
>a combination of various multiples for 60hz.  
>
>I'd bet that the tiny speaker inside a telephone handset can not
>even reproduce a 60Hz tome.  Yes you can hear a hum but it's
>the overtomes of 60 that you hear.  Many people can not even hear
>down to 60Hz, some can but not everyone.