Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1978-01-23
1979-05-01
Stellar, George G.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
181159, H04R 130, H04R 906
Patent
active
041525523
ABSTRACT:
An acoustical horn speaker for producing low distortion sound comprised of a casing assembly having a voice coil gap and a magnetic source and return circuit for providing a constant magnetic field across the gap, a current-carrying voice coil disposed in said gap, and a voice diaphragm in rigid attachment with the voice coil, said voice diaphragm being suspended from the casing assembly by a relatively flexible, high compliance suspension member. An acoustical horn having a throat resistance sufficiently high to substantially dominate the radiation resistance of the diaphragm is air coupled at its throat end to the voice diaphragm suspended from said casing, while the compliance of the voice diaphragm suspension is relatively high such that in the presence of the dominating throat resistance of the horn the diaphragm vibratory movement is characterized by substantially force determinative excursions as opposed to substantially linear constant displacement excursions.
A method of producing low distortion sound in a horn type speaker comprising the step of driving the speaker's diaphragm in a vibratory movement characterized by substantially force determinative excursions as opposed to substantially linear constant displacement excursions.
REFERENCES:
patent: 1713006 (1929-05-01), Round
patent: 1759725 (1930-05-01), Young et al.
patent: 1917012 (1933-07-01), Blattner
patent: 2037185 (1936-04-01), Thuras
patent: 2568883 (1951-09-01), Carrington
patent: 2907837 (1959-10-01), Brami
patent: 4017694 (1977-04-01), King
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