Acoustic transducer and method of making same

Details Acoustic transducer and method of making same Acoustic transducer and method of making same

1978-03-31

1979-07-10

Stellar, George G.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

29594, 179181R, 181171, 181173, H04R 700, H04R 716, H04R 3100

Patent

active

041608836

ABSTRACT:
An acoustic transducer comprising a light weight diaphragm is disclosed in which the internal vibrational resonant modes of the diaphragm are prevented or blocked without damping effects by mounting of the diaphragm on a rigid base parallel thereto by means of a multiplicity of similar parallelograms with flexible corners having dynamically rigid sides the lengths of which are a small part of the wavelength therein of the highest frequency acoustic waves to be transduced with no two adjacent parallelograms being spaced from each other by a distance which is more than a small part of the wave length in the diaphragm of the highest frequency acoustic waves to be transduced. Preferred embodiments are described in which the diaphragm is divided into elements by the parallelograms with the individual elements made rigid by means other than the materials used, for example, by providing appropriate shape or tension in such element.

REFERENCES:
patent: 1778871 (1930-10-01), Smythe

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