POWER INVERTERS DIGITAL AUDIO
Brand Owner (click to sort) Address Description
4D SOUND AFSHAR, SHAHRIAR S. P.O. BOX 1281
BROOKLINE MA 02446		 Abdominal belts containing built-in speakers for...
ACOUSTIC AUDIO Dale Alleman 105 Green Valley Drive
Mt. Zion IL 62549		 Audio amplifiers; Audio electronic components, surround...
CUTTING EDGE AUDIO & VIDEO GROUP Cutting Edge Audio Group, LLC 290 Division St., Suite 103
San Francisco CA 94103		 Audio amplifiers; Audio and video cassette...
MBAUDIO AUTHENTIC FIDELITY YI WU, RUAN 220 Athol Ave.
Apt 308
Oakland CA 946061313		 Audio amplifiers; Audio cables; Audio cassette...
NOMI LinQ Labs, Inc. Suite 216
1931 Old Middlefield Way
Mountain View CA 94043		 Apparatus for broadcasting, recording, transmission or...
 

Where the owner name is not linked, that owner no longer owns the brand

Technical Examples
  1. A digital intercom device consistent with certain embodiments uses power line communication (PLC). A power line interface connects to a power line serving as a communication medium. An audio codec is coupled to the power line interface for encoding and decoding digital data to and from data suitable for use by the power line interface. A digital to analog converter receives digital decoded data from the codec and converts the digital coded data to a received analog signal. A receive audio amplifier amplifies the received analog signal to a level adequate to drive a speaker. A transmit audio amplifier amplifies a transmit audio signal and provides an amplified transmit audio signal as an output. An analog to digital converter converts the amplified transmit audio signal to a digital representation thereof and passes the digital representation to the codec. A control processor controls operation of the interface and the audio codec. A switch interface receiving a signal from a push-to-talk switch, which causes the codec to encode the digital representation and the power line interface to place an OFDM modulated version of the digital representation onto the power line. This abstract should not be considered limiting since other embodiments may incorporate more, fewer or different elements that those described in this abstract.