To provide a
hearing aid system (1000) performing dichotic-listening binaural
hearing aid processing which improves the
clarity of speech and maintains the
spatial perception ability. Each of first and second
hearing aid devices (1100, 1200) includes a sound
pickup unit (1110, 1210) and an output unit (1120, 1220) outputting a sound indicated by a suppressed acoustic
signal. The hearing aid
system (1000) includes: a first band suppression unit (1300) generating the suppressed acoustic
signal indicating the sound outputted from the output unit (1120), by suppressing a
signal in a first suppression-target band out of the acoustic signal outputted from the sound
pickup unit (1110); and a second band suppression unit (1400) generating the suppressed acoustic signal indicating the sound outputted from the output unit (1220), by suppressing a signal in a second suppression-target band out of the acoustic signal outputted from the sound
pickup unit (1210). The suppressed acoustic signals indicating the sounds outputted respectively from the output units (1120, 1220) include, in common, a signal in a non-voice band included in the acoustic signal.