Acoustic Absorption Calculation: Ultrasonic Sound in Water

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SUMMARY

The discussion centers on calculating acoustic absorption in water, particularly for ultrasonic sound. Attenuation is established as being proportional to the square of the frequency, while absorption refers to the conversion of acoustical energy into heat by the medium. There is no standardized formula for calculating the absorption coefficient, as it varies with different frequencies. The relationship between absorption and attenuation is clarified, with attenuation being a result of absorption and dispersion.

PREREQUISITES
  • Understanding of acoustic principles, specifically attenuation and absorption.
  • Familiarity with ultrasonic sound characteristics.
  • Knowledge of frequency's impact on sound propagation in water.
  • Basic grasp of energy conversion processes in physical mediums.
NEXT STEPS
  • Research the specific formulas for calculating ultrasonic sound absorption in water.
  • Explore the relationship between frequency and attenuation in various mediums.
  • Investigate the concept of absorption coefficients and their variability across frequencies.
  • Study the principles of energy conversion in acoustical systems.
USEFUL FOR

Acoustic engineers, researchers in underwater acoustics, and professionals involved in ultrasonic technology applications will benefit from this discussion.

Haziq Zaini
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What is the formula to calculate acoustic absorption in water? particularly sound in the ultrasonic range.
 
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Hi there
welcome to PF

Haziq Zaini said:
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 :smile:

cheers
Dave
 
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.
 
Haziq Zaini said:
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) :smile:
 

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