Lower Frequency Bound of Parametric Arrays

J. Rautenberg, B. Henning, in: 2005.

Download
No fulltext has been uploaded.
Conference Paper | English
Author
;
Abstract
One method to generate focused sound is to transmit amplitude modulated ultrasound of high energy in a nonlinear medium, so that sum and difference frequencies develop. Practically wide arrays of many small ultrasonic transducers are used, but the generation of very low frequencies is always weak. This contribution is about the experimental investigation of the {\textquotedbl}generation zone{\textquotedbl} -- that is the distance between the ultrasonic loudspeaker and the listener -- and the decrease of the lower frequency bound of the audible sound beam with distance. The main focus is on the experimental setup, which permits the parametric sound generation with only one ultrasonic transducer and a waveguide. In addition, the new measurement setup enables to show an additional effect: The de-coherence of the primary ultrasound wave which may be caused by saturation of air. This is why the lower frequency bound decreases as well if we approach the ultrasonic transducer.
Publishing Year
Conference
Workshop on piezoelectric materials and applications in actuators
Conference Location
Paderborn
Conference Date
22.05.2005 – 25.05.2005
LibreCat-ID

Cite this

Rautenberg J, Henning B. Lower Frequency Bound of Parametric Arrays. In: ; 2005.
Rautenberg, J., & Henning, B. (2005). Lower Frequency Bound of Parametric Arrays. Presented at the Workshop on piezoelectric materials and applications in actuators, Paderborn.
@inproceedings{Rautenberg_Henning_2005, title={Lower Frequency Bound of Parametric Arrays}, author={Rautenberg, Jens and Henning, Bernd}, year={2005} }
Rautenberg, Jens, and Bernd Henning. “Lower Frequency Bound of Parametric Arrays,” 2005.
J. Rautenberg and B. Henning, “Lower Frequency Bound of Parametric Arrays,” presented at the Workshop on piezoelectric materials and applications in actuators, Paderborn, 2005.
Rautenberg, Jens, and Bernd Henning. Lower Frequency Bound of Parametric Arrays. 2005.

Export

Marked Publications

Open Data LibreCat

Search this title in

Google Scholar