Direction-based filtering for audio devices using two microphones

A method, comprising:

• in an electronic apparatus:
• receiving, via a first sound input device, a first sound signal that corresponds to a sound that reaches a left ear of a user;
• receiving, via a second sound input device, a second sound signal that corresponds to the sound that reaches a right ear of the user;
• computing a difference between the first sound signal and the second sound signal, wherein the difference includes at least one of an amplitude difference or a phase difference;
• determining the computed difference is within a threshold difference range;
• amplifying or filtering each of the first sound signal and the second sound signal based on the determination that the computed difference is within the threshold difference range;
• receiving, via one of the first sound input device or the second sound input device, a third sound signal;
• analyzing the received third sound signal to determine a frequency response associated with the received third sound signal;
• applying a specific logic on the determined frequency response based on:
• frequency response characteristics of the each of the first sound signal and the second sound signal, and
• a head related transfer function;
• comparing the determined frequency response of the third sound signal with the frequency response characteristics of the each of the first sound signal and the second sound signal;
• filtering the analyzed third sound signal based on the comparison between the determined frequency response of the third sound signal and the frequency response characteristics of the each of the first sound signal and the second sound signal;
• and
• controlling, via a plurality of sound output devices, a playback of the amplified or filtered first sound signal, the amplified or filtered second sound signal, and the filtered third sound signal.

A non-transitory computer-readable medium having stored thereon, computer-executable instructions which, when executed by a computer, cause the computer to execute operations, the operations comprising:

• receiving, via a first sound input device, a first sound signal that corresponds to a sound that reaches a left ear of a user;
• receiving, via a second sound input device, a second sound signal that corresponds to the sound that reaches a right ear of the user;
• computing a difference between the first sound signal and the second sound signal, wherein the difference includes at least one of an amplitude difference or a phase difference;
• determining the computed difference is within a threshold difference range;
• amplifying or filtering each of the first sound signal and the second sound signal based on the determination that the computed difference is within the threshold difference range;
• receiving, via one of the first sound input device or the second sound input device, a third sound signal;
• analyzing the received third sound signal to determine a frequency response associated with the received third sound signal;
• applying a specific logic on the determined frequency response based on:
• frequency response characteristics of the each of the first sound signal and the second sound signal, and
• a head related transfer function;
• comparing the determined frequency response of the third sound signal with the frequency response characteristics of the each of the first sound signal and the second sound signal;
• filtering the analyzed third sound signal based on the comparison between the determined frequency response of the third sound signal and the frequency response characteristics of the each of the first sound signal and the second sound signal;
• and
• controlling, via a plurality of sound output devices, a playback of the amplified or filtered first sound signal, the amplified or filtered second sound signal, and filtered third sound signal.