| 摘要 |
An earphone compatible with principle of acoustics comprises a case, a set of voice emitting components, and a connecting wire. The case provides a plurality of apertures thereon and a wire hole. The voice emitting components are received in the case and at least include a vibratory membrane and a magnet. The vibratory membrane near the wire hole and away the lateral side of the case. The connecting wire at an end thereof is joined to the magnet and at the other end thereof passes through the wire hole and extending outward to connect with an audio device. While the earphone is inserted into the ear, a lateral end of the case faces the acoustic meatus and the vibratory membrane faces the outer opening space. Hence, it is possible to form a desirable resonant space confined by way of the case, the acoustic meatus, and the eardrum.
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