Patents Represented by Law Firm Delarosa & Delarosa
  • Patent number: 5548654
    Abstract: An infrared assistive listening system capable of enhanced performance in medium-sized locations, such as courtrooms, classrooms, and conference rooms, is realized by a system comprising a pressure zone microphone capable of picking up distant speakers, a high-gain pre-amplifier, an equalization and pre-emphasis circuit, an automatic gain control and limiting circuit, a mute feature capable of remote activation, a FM modulator, a pulse width modulator, and a high-power single front throw infrared emitter. Another embodiment of the invention employs an multi-directional infrared emitter array in conjunction with the single front throw emitter.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: August 20, 1996
    Inventor: Lawrence R. Fast