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Re: alternative generation of ultrasound waves

Posted by: Joel Vargas , E-mail: vargas.joel@gmail.com, on August 18, 2005 at 02:38 :

In Reply to: alternative generation of ultrasound waves posted by : kostas papas , E-mail: lakourtis@hotmail.com, on December 17, 2004 at 23:43 :

Dear Srs.
Let me first introduce. I am Joel Vargas and I am working with LRUT for pipelines inspection and as you know it works with piezoelectric efect. So the point is if some body knows the diference betwen LRUT and Magnetostrictive wave generations methods..

the second is that in LRUT I can use torsional mode and longitudinal mode. It is possible with Magnetostrictive method?

By other hand EMAT transducer are the same of Magnetostrictive transducers or it is a diferent method of wave Generation?

I hope some one of you can help me.

PS:Sorry for my enghish.

--- Start Original Message -----------
: The use of piezoelectric transducers is well spread for the generation and receive of ultrasound waves. The use of microphones is also an existing technique for receiving acoustic and ultrasonic waves.
: However what about microphone-speaker technology to generate and transmit ultrasound waves through solid material?
: Is mechanical coupling (efficiency coef) a problem when generating waves by means of speakers?
: This is an academic question that was brought about after using piezoelectric transducers.
------------ End Original Message ------------

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• Re: alternative generation of ultrasound waves Godfrey Hands 10:26 Aug-20-2005 (0)

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----------- Start Original Message ----------- : Dear Srs. : Let me first introduce. I am Joel Vargas and I am working with LRUT for pipelines inspection and as you know it works with piezoelectric efect. So the point is if some body knows the diference betwen LRUT and Magnetostrictive wave generations methods.. : the second is that in LRUT I can use torsional mode and longitudinal mode. It is possible with Magnetostrictive method? : By other hand EMAT transducer are the same of Magnetostrictive transducers or it is a diferent method of wave Generation? : I hope some one of you can help me. : PS:Sorry for my enghish. : --- Start Original Message ----------- : : The use of piezoelectric transducers is well spread for the generation and receive of ultrasound waves. The use of microphones is also an existing technique for receiving acoustic and ultrasonic waves. : : However what about microphone-speaker technology to generate and transmit ultrasound waves through solid material? : : Is mechanical coupling (efficiency coef) a problem when generating waves by means of speakers? : : This is an academic question that was brought about after using piezoelectric transducers. ------------ End Original Message ------------

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