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Voice detection and discrimination apparatus and method

  • US 6,728,385 B2
  • Filed: 03/01/2002
  • Issued: 04/27/2004
  • Est. Priority Date: 02/28/2002
  • Status: Expired due to Term
First Claim
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1. Voice detection and discrimination apparatus for controlling a voice operated system comprising a protective ear terminal element (1,2) for protecting the ear by providing acoustic attenuation,an inner electroacoustic transducer element (M2) on an inner side of the ear terminal element (1,2) for detecting a first acoustic field and providing a first electronic signal representing said first acoustic field, an outer electroacoustic transducer element (M1) on an outer side of the ear terminal element (1,2) for detecting a second acoustic field and providing a second electronic signal representing said second acoustic field, an electronics unit (11,E3) connected with said electroacoustic transducer elements (M1,M2) and comprising first comparison means (27) for comparison of said first and second electronic signals to obtain the difference between said two electronic signals, and second comparison means (28) for comparing said difference with given criteria, and output means (13,E12) connected to said electronics unit for providing an output signal depending on said second comparison, said output signal is an input signal to the voice operated system (29), wherein the criteria comprises a predetermined difference in acoustic signal strength as detected by the two electroacoustic transducer elements (M1,M2) in a noisy environment.

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