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    • 8. 发明授权
    • Remote control audio apparatus for hunters
    • 用于猎人的遥控音频设备
    • US5572592A
    • 1996-11-05
    • US452885
    • 1995-05-30
    • Bruce Muckelrath
    • Bruce Muckelrath
    • H04R27/00H04R21/00
    • H04R27/00
    • A remote control audio apparatus for use by hunters having the capability of either recording or reproducing predator calls, game calls and the like. Audio reproduction and/or recording apparatus is disposed within a weather resistant enclosure. A radio transmitter and receiver is provided for generating, transmitting and receiving operating radio signals under manual control for remotely operating the audio apparatus. The radio remote control receiver is detachable from the audio apparatus. In one embodiment, a weather resistant external speaker may be stored within the weather resistant enclosure or detachably mounted to the exterior of the weather resistant enclosure.
    • 具有能够记录或再现捕食者呼叫,游戏呼叫等的猎人使用的遥控音频装置。 音频再现和/或记录装置设置在耐候性外壳内。 提供无线电发射机和接收机,用于在手动控制下产生,发射和接收操作无线电信号,以远程操作音频装置。 无线电遥控接收器可从音频设备拆卸。 在一个实施例中,耐候性外部扬声器可以存储在耐候性外壳内或可拆卸地安装到耐候外壳的外部。
    • 9. 发明授权
    • Electroacoustic transducer having a partition wall and a mask wall
    • 具有分隔壁和面罩壁的电声换能器
    • US5303209A
    • 1994-04-12
    • US78718
    • 1993-06-16
    • Ewald Frasl
    • Ewald Frasl
    • H04R1/28H04R1/22H04R9/02H04R21/00
    • H04R1/225H04R9/02
    • In an electroacoustic transducer (1) having a diaphragm (5), behind which a partition wall (24) is situated, which partition wall extends transversely of the transducer axis (9) and is traversed by partition openings (29, 30, 31, 32) having a small cross-sectional area of at the most 0.2 mm.sup.2, and having a mask wall (38) arranged adjacent the partition wall and provided with mask-wall openings (39, 40, 41, 42) of large cross-sectional area, in the other wall (38) being coincident with at least one opening (29, 30, 31, 32) of small cross-sectional area, each opening (29, 30, 31, 32) of small cross-sectional area is situated between two spacer elements (49, 50, 51, 52, 53, 54, 55, 56) arranged between the two walls (24, 38), and each time two spacer elements (49, 50, 51, 52, 53, 54, 55, 56) together with the two walls (34, 38) bound a duct-like gap (57, 58, 59, 60) between the two walls (24, 38) in order to form an acoustic resistance.
    • 在具有隔膜(5)的电声换能器(1)中,分隔壁(24)位于其后面,该分隔壁横向于换能器轴线(9)延伸并且由分隔开口(29,30,31,34)穿过, 32),具有最小0.2mm 2的小横截面面积,并且具有邻近分隔壁布置的掩模壁(38),并且设置有大截面的掩模壁开口(39,40,41,42) 在另一个壁(38)中与至少一个具有小横截面面积的开口(29,30,31,32)重合的区域,每个具有小横截面面积的开口(29,30,31,32)是 位于布置在两个壁(24,38)之间的两个隔离元件(49,50,51,52,53,54,55,56)之间,并且每次间隔元件(49,50,51,52,53,55) 54,35,56)与两个壁(34,38)一起结合在两个壁(24,38)之间的管状间隙(57,58,59,60),以便形成声阻。