Acoustic horn for use in cellular flip phones

Details Acoustic horn for use in cellular flip phones Acoustic horn for use in cellular flip phones

1996-05-03

1998-11-03

Chiang, Jack

Telephonic communications

Terminal

Housing or housing component

379434, H04M 100

Patent

active

058320792

ABSTRACT:
A pivotable flip element for use with hand-held radiophone units is specially configured to provide highly efficient coupling of acoustic energy into and out of the radiophone by virtue of an acoustic horn precisely formed as an interior cavity of the planar pivotable element. When arranged as a device for coupling acoustic energy into a microphone fixedly mounted to the radiophone housing, incident sound is directed from the horn mouth to its throat section, and thereafter through a rotary acoustic joint to an input channel to the microphone. The continuously rotatable rotary joint accommodates flip element rotations, allowing for the dualpurpose operations of protecting and covering the radiophone keyboard when not in use, and efficient input sound coupling when deployed.

REFERENCES:
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patent: 5282245 (1994-01-01), Anderson
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Product Brochure CEL 4000 Ericsson Cellular Phone .COPYRGT. Dec. 1995 Ericsson Inc., Research Triangle Park, North Carolina 27709.
Product Brochure CEL 4001, Digital Cellular Phone .COPYRGT. Dec. 1995 Ericsson Inc., Research Triangle Park, North Carolina 27709.
Hanna, R.C. et al, "The Function and Design of Horns for Loudspeakers, " Trans. AIEE, vol. 44 (Feb. 1924): 393-404.

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