| Subject: | Re: Amplitude and frequency attenuation vs. distance |
|---|---|
| From: | "umashankar" umashanks |
| Date: | Mon May 23, 2011 5:37 pm ((PDT)) |
in fact frequencies above the normal audio band are attenuated very much mo= re. i think the window opens again after a certain frequency.=A0humidity (frequen= cy dependent) and temperature (broadband) affect the rate of attenuation. ther= e are some references, but i cannot recollect offhand. umashankar =A0i have published my poems. you can read (or buy) at http://stores.lulu.com/umashankar |
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