Electric and electronic communication instruments and components, namely, signal processors for electro-acoustics and structural parts thereof, as well as attachments therefor for active interference of noise suppression in the nature of microphones, loudspeakers and sound frequency phase shifters; analogue and digital electro-acoustic systems and apparatuses comprising hardware in the nature of audio transmitters, high-frequency audio receivers, and high-frequency input modules for providing a harmonious sound balance; apparatus for recording and reproducing electrical sound signals, namely, microphones, audio receivers, electro acoustic transducers, headphones, loudspeakers, and stereo amplifiers; apparatus for wireless transmission of acoustic information, namely, stereo receivers, audio receivers, stereo amplifiers, and stereo tuners; electro-acoustic systems for recording, transmission and reproduction of audio signals and filters for electronic and electro-acoustic purposes, namely, amplifiers, electronic volume controls, loudspeakers, microphones, antennas, electric accumulator plugs, plug battery chargers, electrical listener cables and transducers in the nature of headsets for hearing and speaking, and electric, electronic and electro-acoustic signal processors for the transmission of audio visual signals; apparatus for the wireless transmission, transfer and reception of sound or video signals, namely, digital transmitters, multi-channel transmitters and single-channel transmitters, and infrared transmitters and receivers all for use in the electro acoustic field; electric, electronic and electro-acoustic apparatus and instruments for use in the electro-acoustic field, namely, telephones, including telephones with hearing amplifiers and speech attachments in the nature of audio speakers