Submersible headphones

Details Submersible headphones Submersible headphones

2005-11-01

2005-11-01

Grier, Laura A. (Department: 2644)

Electrical audio signal processing systems and devices

Headphone circuits

C381S370000

Reexamination Certificate

active

06961434

ABSTRACT:
Submersible headphones comprising an acoustic circuit in which the electro-acoustic transducer is separated from the open proximal end of the circuit by a length of small hollow tube, and the volume of air in the tube is at least equal to the volume of air in the transducer itself. When the headphones are accidentally dislodged from the ear at some depth below the surface of a body of water, the proportioning of the volume of the air in the tube so that it at least equals the volume of air in the transducer prevents water from traveling down the tube into contact with the transducer. The tube is constructed of hydrophobic material, which tends to prevent water from entering the small diameter tube at atmospheric pressure. Transducers that are suitable for use include piezoelectric transducers and bipolar armature transducers.

REFERENCES:
patent: 4456797 (1984-06-01), Olsen
patent: 4584718 (1986-04-01), Fuller
patent: 4683587 (1987-07-01), Silverman
patent: 5488961 (1996-02-01), Adams
patent: 5600730 (1997-02-01), Kenning et al.
patent: 5881729 (1999-03-01), Castillo

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