Acoustic Absorption Calculation: Ultrasonic Sound in Water

[Haziq Zaini]

What is the formula to calculate acoustic absorption in water? particularly sound in the ultrasonic range.

 

[davenn]

Hi there
welcome to PF

What is the formula to calculate acoustic absorption in water? particularly sound in the ultrasonic range.

doesn't matter what frequency

attenuation is proportional to the freq ²

there's dozens of hits on google when ultrasonic sound absorption in water is typed in

http://www.bing.com/search?q=ultras...opResult&FORM=IETR02&conversationid=&pc=EUPP_

time for you to go do some reading

cheers
Dave

 

[Haziq Zaini]

thanks dave

i understand that Attenuation is the gradual decrease/dissipation of Acoustical energy whereas Absorption is the acoustical energy being takenup by the medium; in this case, acoustical energy is converted to heat.

Like u said attenuation has a proportional relationship to the frequency. However, there is not really a standard Absorption formula or absorption coefficient.If there was I probably, haven't found it or unable to comprehend. From what i found; at different frequencies, the absorption coefficient varies. Correct me if I'm wrong.

 

[davenn]

whereas Absorption is the acoustical energy being takenup by the medium; in this case, acoustical energy is converted to heat.

not whereas ... attenuation is the result of absorption ( and dispersion)