Sound tube tuned multi-driver earpiece

Details Sound tube tuned multi-driver earpiece Sound tube tuned multi-driver earpiece

2008-01-08

2008-01-08

Ensey, Brian (Department: 2615)

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

C381S322000

Reexamination Certificate

active

07317806

ABSTRACT:
A method of optimizing the audio performance of an earpiece and the resultant device are provided. The disclosed earpiece combines at least two drivers within a single earpiece. If a pair of drivers is used, each driver has a discrete sound delivery tube. If more than two drivers are used, preferably the outputs from the two lower frequency drivers are merged into a single sound delivery tube while the output from the third driver is maintained in a separate, discrete sound tube. To compensate for the inherent phase shift of the earpiece the lengths of the sound delivery tubes, and thus driver offset, are regulated. Further audio performance optimization can be achieved through an iterative process of measuring the performance of the earpiece and making further, minor adjustments to the sound delivery tube lengths. The sound delivery tubes can include transition regions. The earpiece is configured to use removable/replaceable eartips. Acoustic filters can be interposed between one or both driver outputs and the earpiece output.

REFERENCES:
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patent: 4677679 (1987-06-01), Killion
patent: 4763753 (1988-08-01), Killion
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patent: 5887070 (1999-03-01), Iseberg et al.
patent: 2006/0045297 (2006-03-01), Haussmann
patent: 05022797 (1993-01-01), None

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