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    • 14. 发明授权
    • Sealed headphone
    • 密封耳机
    • US4239945A
    • 1980-12-16
    • US859815
    • 1977-12-12
    • Nobuhisa AtojiShoichi KusomotoKazue Sato
    • Nobuhisa AtojiShoichi KusomotoKazue Sato
    • H04R1/10H04R1/22
    • H04R1/2819H04R1/1008
    • A sealed headphone having an improved sound pressure versus frequency response characteristic is disclosed. The sealed headphone comprises a mounting plate having coupling apertures, an electro-acoustic transducer attached to one side of the mounting plate and a casing covering the transducer. A space defined by the rear side of the transducer and the casing communicates via the coupling apertures with another spaced formed on the opposite side of the mounting plate so as to form an acousto-mechanical resonance circuit within the headphone. By raising the parallel resonance frequency of the resonance circuit, a higher reproduced frequency limit of the headphone is achieved.
    • 公开了一种具有改善的声压与频率响应特性的密封耳机。 密封耳机包括具有联接孔的安装板,附接到安装板的一侧的电声换能器和覆盖换能器的壳体。 由换能器和壳体的后侧限定的空间经由联接孔与安装板的相对侧上形成的另一个间隔连通,以在耳机内形成声 - 机械谐振电路。 通过提高谐振电路的并联谐振频率,实现了耳机的更高的再现频率极限。