Hearing aids with adjustable directivity

A hearing aid, comprising:

• a plurality of microphones configured to receive an initial sound signal and convert the initial sound signal into an electrical signal, wherein the plurality of microphones includes a first microphone and a second microphone that are spaced apart from the first microphone;
• a processor configured to process the electrical signal and generate a control signal;
• and
• a speaker configured to convert the control signal into a hearing aid sound signal, wherein to process the electrical signal and generate the control signal, the processor is configured to:
• adjust a directivity of the initial sound signal received by the plurality of microphones, so that a sound intensity of a first sound signal from a direction of the speaker in the initial sound signal is always greater than or always less than a sound intensity of a second sound signal from other directions around;
• wherein
• the sound intensity of the first sound signal from the direction of the speaker in the initial sound signal collected by the plurality of microphones is always greater than the sound intensity of the second sound signal from other directions in the environment, the processor is configured to:
• extract the first sound signal from the speaker in the initial sound signal;
• subtracted a portion of the first sound signal from a second electrical signal corresponding to a sound signal obtained by any one or both of the first microphone or the second microphone to obtain the second sound signal from other directions in the environment;
• generate a control signal based on the second sound signal, the control signal being transmitted to the speaker, the control signal being converted into the hearing aid sound signal;
• or
• the sound intensity of the first sound signal from the direction of the speaker in the initial sound signal collected by the plurality of microphones is always less than the sound intensity of the second sound signal from other directions in the environment, the processor is configured to:
• generate a control signal based on the second sound signal, the control signal being transmitted to the speaker, and the control signal being converted into the hearing aid sound signal.