Transducer Power Levels
Transducer Power Levels
(OP)
I am new to the acoustics area, and I am trying to determine what I am missing as far as transducer power levels are concerned. I am currently in the process of characterizing how ultrasonic energy propagates through a building. To do so, I wish to develop a high power ultrasonic transmitter which can be variably attenuated.
Manufactures list an SPL rating for their transducers in the spec sheets given at a known distance, usually 30cm. How can a small low power transducer, (Prowave 250ST180) have more SPL output than a 400W tweeter at 25kHz? Is there some parameter that I am not taking into consideration here? I would assume that SPL is directly related to the amplitude of the moving air particles, if a larger tweeter moves more air, isnt there more SPL?
Clearly this EE knows nothing about acoustics!
Prowave 250ST180 Link
Motorola KSN-1142 Link






RE: Transducer Power Levels
RE: Transducer Power Levels
Given that fact, what would be the most reasonable approach to selecting a transducer for use in the application? Again, we want to measure ultrasound inside of a building with the source being outside. We're looking for the minimum power required to get us through X walls of a building. Our current approach is to attenuate the source until we can no longer detect it inside.
RE: Transducer Power Levels
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RE: Transducer Power Levels
http://www.massa.com/fundamentals.htm
Walt
RE: Transducer Power Levels
Its difficult for me to get into detail about my application,I need to evaluate how much power I will need to allow for detection of ultrasound inside of a building. The building construction will be of various types. Wood, brick, and other materials.
My goal now is to build a very high power, 100+W, transmitter. My assumption is that I can then determine the attenuation of the building as well as a minimum transmitter power required to penetrate the building.
I apologize for the vagueness, unfortunately I cannot divulge much information!
Thanks!
RE: Transducer Power Levels
Walt
RE: Transducer Power Levels
Brass Components Jamnagar
Thanks.