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05:24 Dec-01-1999
Volker Scherer
sound attenuation and dispersion in gases

I need data for attenuation and dispersion of ultrasound in gases. Also, information on changes of sound velocity with relative humidity is helpful. Where can I read data (on-line tables?) ?

Thanks

Volker


 
06:05 Dec-01-1999

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1197
Re: sound attenuation and dispersion in gases Try looking at Allan Selfridge's Home Page
http://www.ultrasonic.com/
on the left column is an item on Acoustic Propoerties with a variety of options
Included is an Excel spreadsheet from an associate of Dr. Selfridge.


: I need data for attenuation and dispersion of ultrasound in gases. Also, information on changes of sound velocity with relative humidity is helpful. Where can I read data (on-line tables?) ?

: Thanks

: Volker




 
06:35 Dec-01-1999
Volker Scherer
Re: sound attenuation and dispersion in gases Thank your for helping. The data, however do only provide standard environments and no frequency dependence or attenuation. This part is still open.


 
00:58 Aug-21-2000
PAUL
attenuation these are question's for a assignement of mine

WHAT PROPERTIES OF THE TRANSMISSION LINE CAUSE THIS ATTENUATION
HOW TO OVERCOME ATTENUATION
HOW TO CHANGE FOR TWO-WIRE TO FOUR-WIRE SYSTEM

i hope you can help me with these!!!!!!
thanks


 


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