| 摘要 |
A low-noise transmitting receiving earset includes a housing covered with a grille, a speaker mounted inside the housing adjacent to the grille and facing the back side of the housing, a first microphone mounted in the hub of the grille and facing the front side of the housing for picking up resonant sound waves from the external auditory canal of the user's ear, and a second microphone mounted inside the housing remote from the speaker for receiving voices directly from the user's mouth.
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