| 摘要 |
<p>Receivers in conventional transmitter/receivers had the defect of unclear acoustics. The purpose of the present invention is to provide a receiver capable of clear acoustics. Sound waves from a sound-emitting body are effectively transmitted to the eardrum, by setting the incident angle relative to a head cross-section in the sound wave radiation axis of the sound-emitting body used in a transmitter/receiver to greater than 0° and less than 90° or by using a plurality of sound-emitting bodies having sound wave radiation axes of different incident angles. Alternatively, when a plurality of sound-emitting bodies are provided, one sound-emitting body among the plurality of sound-emitting bodies is arranged such that the incident angle relative to the auricular-abutting surface in the sound wave radiation axis for said sound-emitting body is greater than 0° and less than 90° and such that the sound wave radiation axis or the next sound wave radiation axis for all sound-emitting bodies other than the one sound-emitting body is orthogonal to the sound wave radiation axis or the next sound wave radiation axis for the one sound-emitting body.</p> |
