US Patent 9729978 Systems and methods for suppressing sound leakage

The present disclosure relates to a method of reducing sound leakage of a bone conduction speaker and a bone conduction speaker thereof. The bone conduction speaker comprises a housing, a vibration board and a transducer. The transducer is located in the housing, and the vibration board is configured to contact with skin and pass vibration. At least one sound guiding hole is set on at least one portion of the housing to guide sound wave inside the housing to the outside of the housing. The guided wave and the leaked sound wave form interference so that the amplitude of the leaked sound wave is reduced.