Processing audio signals using a state variable

Program dependent crossover filter (PDC)

Prosthetic device for optimizing speech understanding through ad

Radio with audio graphic equalizer

Recording and reproducing apparatus for audio signal

Resistively damped loudspeaker system

ROM compensated microphone

Self-compensating equalizer

Series-configured crossover network for electro-acoustic...

Signal amplification system with automatic equalizer

Signal control apparatus

Signal processing device for processing sound quality, and recor

Signal processing system, signal processing apparatus and...

Signal processing system, signal processing apparatus and...

Signal transfer and system utilizing transmission lines

Slide control system

Sound device

Sound field control apparatus and sound field control method

Sound field correcting method in audio system

Sound field expanding apparatus with improved tone control syste