Loudspeakers, Microphones, Gramophone Pick-ups Or Like Acoustic Electromechanical Transducers; Deaf-aid Sets; Public Address Systems
G06F
Electric Digital Data Processing
G10K
Sound-producing Devices ; Methods Or Devices For Protecting Against, Or For Damping, Noise Or Other Acoustic Waves In General; Acoustics Not Otherwise Provided For
G10L
Speech Analysis Or Synthesis; Speech Recognition; Speech Or Voice Processing; Speech Or Audio Coding Or Decoding
