| 摘要 |
PURPOSE:To obtain a multi-purpose interactive type dynamic microphone by providing a clearance having an additional mass that reaches an in-diaphragm chamber in a part of a synthetic resin with which a magnetic yoke is molded. CONSTITUTION:The clearance 11 reaching the in-diaphragm chamber 6 formed with the synthetic resin 2 and an acoustic resistance material 5 is provided in a part of the resin 2. Consequently, by means of the additional mass of the clearance 11 formed by the synthetic resin 2 with which magnetic yoke 1 is integrally molded and the acoustic resistor material 5, a resonance can be set in the middle of a frequency band 150-300Hz that is important for a speech/ vocal microphone, and the acoustic resistance of the clearance 11 is made controllable. As a result, the output frequency characteristic 12 of a spherical wave sound source (interactive) in the forward direction can be lifted in the frequency band 150-300Hz. And the titled microphone to which output level is attenuated in the low frequency band that causes the occurrence of obscure sounds, can be obtained.
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