Acoustic device and acoustic processing method

1. An acoustic device comprising:

a member which divides an ear canal of a user and an external space when being attached to an ear or the ear canal of the user;

a selector that selects a sound to be passed or a sound not to be passed by the filter processing;

a memory that stores instructions; and

a processor that executes the instructions, wherein

the instructions cause the processor to perform:

acquiring a sound signal indicating a sound;

applying a filter processing to the acquired sound signal, the filter processing being changed in accordance with a predetermined condition; and

radiating the sound indicated by the sound signal applied with the filter processing to the ear canal;

changing the filter processing in accordance with the selected sound; and

determining, based on a signal input by the user when a specific sound is passed, whether to select the specific sound as the sound to be passed or the sound not to be passed.

2. The acoustic device according to claim 1 , further comprising:

a detector that detects an external sound, wherein the instructions cause the processor to perform:

acquiring a sound signal indicating the external sound detected by the detector or a sound signal indicating a sound received via a communication device.

3. The acoustic device according to claim 1 , further comprising:

a communicator that acquires a signal for selecting the sound to be passed or the sound not to be passed, wherein the instructions cause the processor to perform:

selecting the sound to be passed or the sound not to be passed based on the signal acquired by the communicator.

4. The acoustic device according to claim 1 , wherein

the selector selects the sound to be passed or the sound not to be passed in accordance with a geographical position of the acoustic device.

5. The acoustic device according to claim 1 , wherein

the selector selects the sound to be passed or the sound not to be passed in accordance with time.

6. The acoustic device according to claim 1 , wherein

the selector selects the sound to be passed or the sound not to be passed in accordance with an operation by the user.

7. The acoustic device according to claim 1 , wherein

the selector selects the sound to be passed or the sound not to be passed in accordance with an attribute of the user.

8. The acoustic device according to claim 1 , wherein the instructions cause the processor to perform:

radiating a sound indicated by the sound signal applied with the filter processing and an alternative sound different from the sound to the ear canal at a same timing.

9. The acoustic device according to claim 1 , wherein the instructions cause the processor to perform:

recognizing a speaker based on a feature of voice of the speaker,

selecting the voice of the recognized speaker as the sound not to be passed.

10. The acoustic device according to claim 1 , wherein the instructions cause the processor to perform detecting a biological signal of the user, wherein

the selector selects the sound to be passed or the sound not to be passed in accordance with a change in the biological signal.

11. The acoustic device according to claim 2 , wherein

the selector selects the sound to be passed or the sound not to be passed in accordance with an utterance of the detected sound of the user.

12. The acoustic device according to claim 1 , wherein

the selector selects the sound to be passed or the sound not to be passed in accordance with a direction of a housing of the acoustic device and an arrival direction of a sound from an outside.

13. An acoustic processing method comprising:

acquiring a sound signal indicating a sound;

applying a filter processing to the sound signal acquired in the acquiring step;

changing the filter processing in the filter processing step in accordance with a predetermined condition;

radiating the sound indicated by the sound signal applied with the filter processing to an ear canal;

selecting a sound to be passed or a sound not to be passed through the filter processing;

changing the filter processing in accordance with the selected sound; and

determining, based on a signal input by a user when a specific sound is passed, whether to select the specific sound to be passed or the sound not to be passed.

14. The acoustic processing method according to claim 13 , further comprising:

detecting an external sound; and

acquiring a sound signal indicating the external sound or a sound signal indicating a sound received through communication.

15. The acoustic processing method according to claim 13 , further comprising:

performing communication to acquire a signal for the sound to be passed or the sound not to be passed; and

selecting the sound to be passed or the sound not to be passed based on the signal acquired by the communication.

16. The acoustic processing method according to claim 13 , further comprising:

recognizing a speaker based on a feature of voice of the speaker; and

selecting the voice of the speaker recognized in the recognizing as the sound not to be passed.

17. The acoustic processing method according to claim 13 , further comprising:

detecting a biological signal of the user; and

selecting the sound to be passed or the sound not to be passed in accordance with a change in the biological signal.