Device and method for muffling, communication device and wearable device

A muffling device comprising:

• an acquisition circuit, configured to obtain reference sound wave information of a user;
• a modulation circuit, configured to analyze an acoustic wave characteristic of the reference sound wave information to obtain a characteristic parameter of the reference sound wave information;
• a muffling circuit, configured to generate compensated sound wave information according to the characteristic parameter of the reference sound wave information, wherein a characteristic parameter of the compensated sound wave information and the characteristic parameter of the reference sound wave information are complementary to each other;
• a correction circuit, configured to compare muffed sound wave information superimposed by the compensated sound wave information and the reference sound wave information with the reference sound wave information, and feed back a comparison result to the muffling circuit, wherein the muffling circuit is further configured to adjust the compensated sound wave information according to the fed back comparison result;
• and
• an output circuit, configured to output adjusted compensated sound wave information.