AUDIO AMPLIFIER DESIGNED TRANSMIT

Brand	Owner	Address	Description
ELEPHONE	SUPER DUPER INC.	5201 Pelham Roard Greenville SC 29615	Audio amplifier designed to transmit and amplify speech sounds from the user's mouth to the user's ear or to amplify a speaker's voice into a another listener's ear for the improvement of auditory processing in areas of speech, sound recognition and reading;ELECTRONIC PHONE;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

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.