Hearing aid and method for controlling the same

A hearing aid comprising

• a hardware processor, the hardware processor being configured to:
• produce a spectrum signal which indicates a frequency component included in a first acoustic signal received by a microphone;
• calculate, using the spectrum signal, a control gain value;
• amplify the first acoustic signal using the control gain value to produce the second acoustic signal;
• detect a predetermined sound in the first acoustic signal from the spectrum signal, the predetermined sound occurring abruptly;
• produce a plurality of control signals, each of which indicates a corresponding one of suppression amounts each of which is allocated to a corresponding one of a plurality of frequency components in the predetermined sound in the first acoustic signal;
• apply at least one of the control signals to the second acoustic signal to attenuate the predetermined sound in the second acoustic signal;
• output at least one of the control signals;
• and
• control the control gain value calculated using the spectrum signal, using a calculation based on the at least one of the outputted control signals,
• wherein the hearing aid further comprises:
• a volume adjusting switch for a user to input a volume adjusting amount for adjusting a volume of an output sound signal of the hearing aid;
• and
• a variable gain controller to control a gain value according to the input volume adjusting amount, the gain value being applied to the second acoustic signal to adjust the volume of the output sound signal, and
• wherein the hardware processor is further configured to:
• increase or decrease the at least one of the control signals applied to the second acoustic signal based on a difference between the adjusted volume of the output sound signal and a predetermined reference value, when the adjusted volume of the output sound signal is lower than the predetermined reference value.