Acoustical receiver and pen transcription system adapted for rejecting virtual pen images
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United States of America Patent
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Feb 4, 2014
Grant Date -
Jun 27, 2013
app pub date -
Dec 23, 2011
filing date -
Dec 23, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An acoustical receiver for detecting an acoustical signal characterized by a wavelength and a pen transcription system utilizing the same are disclosed. The receiver includes a detector that generates an electrical signal in response to acoustical signals in a predetermined frequency range including that wavelength, a housing surrounding the detector, and a receiving horn. The housing has a housing aperture having a maximum dimension less than the acoustical signal wavelength. The receiving horn has a first opening that is adjacent to the housing aperture and a second aperture having a dimension that is greater than the acoustical signal wavelength.
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International Classification(s)
- G08B:SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; A....
- G08C:TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL ....
- H04B:TRANSMISSION
- G06F:ELECTRIC DIGITAL DATA PROCESSING
- G03B:APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS O....
- G01S:RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMI....
- G06K:RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD ....
- H05K:PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAIL....
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