David Mountain resumes & CV records
Resumes
David Mountain
David Mountain
David Mountain
Location:
United States
David J Mountain, 57Barrington, NH
David Mountain Phones & Addresses
Barrington, NH
Northwood, NH
28 Ells Rd, Hampstead, NH 03841 603-4891483
Salem, NH
Mentions for David J Mountain
Publications & IP owners
Us Patents
Acoustic Mobility Aid For The Visually Impaired
US Patent:
2009012, May 14, 2009
Filed:
Nov 12, 2008
Appl. No.:
12/269159
Inventors:
David C. Mountain - Byfield MA, US
Cameron J. Morland - Cambridge MA, US
Cameron J. Morland - Cambridge MA, US
Assignee:
Trustees of Boston University - Boston MA
International Classification:
G01S 15/00
US Classification:
367 93
Abstract:
A wide-band sonar system can be used as a mobility aid by the visually impaired. The system includes an acoustic source and a pair of miniature microphone arrays with frequency-dependent beam patterns designed to mimic the properties of the human ear. Each microphone is preferably mounted near a respective ear of the user. In one embodiment the source has a bandwidth of 30-50 kHz and uses a waveform that preferably optimizes the time-bandwidth product. A heterodyning technique is used to shift the received signal down to the audible range (20 Hz-20 kHz), after which it is presented to the user through open-style earphones. The acoustic source and microphone arrays are mounted on the user's head so that the system will always be aligned therewith—as an example, they may be mounted near the user's ears on conventional eyeglass frames or a similar mounting device.
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