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Universal listening device

  • US 4,850,023 A
  • Filed: 12/22/1986
  • Issued: 07/18/1989
  • Est. Priority Date: 12/22/1986
  • Status: Expired due to Fees
First Claim
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1. A listening device for detecting audio frequency sounds in an environmental volume adjacent to the listening device and presenting the detected sounds at an increased sound level or power density to the ears of a device user, comprising:

  • a lightweight cylindrical housing, having a cylindrical sidewall about 1.0 inch or less high, with at least two sound transfer ports disposed on said sidewall less than 180 degrees apart and generally circular front and back end walls with a diameter of about 1.5 inches or less, said front end wall having at least one sound input port disposed in a central location thereon;

    first and second hollow tubular members having first and second ends, each of said first ends connected to one of said sound transfer ports, said tubular members extending outward from said housing in an arcuate shape so as to place said second ends adjacent a device user'"'"'s ears, and having ear plug adapters on said second ends for interfacing with the user'"'"'s ears;

    acoustical connection means disposed about said sound input port for releasably connecting one end of acoustical transfer tubing to said sound input port;

    audio processing means disposed within said housing for detecting input sounds and amplifying them to have a higher power density than when detected, comprising;

    at least one sound detection means mounted adjacent said front wall sound port for detecting said sounds and converting them to electrical signals whose amplitudes correlate to relative amplitudes of said detected sound waves;

    at least one amplification means mounted within said housing and connected to said sound detection means for increasing the power level of said electrical signals;

    at least one sound generation means connected to said amplification means for generating audio frequency output sound waves from said amplified electrical signals; and

    coupling means disposed within said housing and connected between said sound generation means and said hollow tubular members for coupling sound therebetween.

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