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r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r

r  r	r  r	r  r	r  r	r  r	r  r
r  r	r r NO.r r	r r 项目 rItemr r	r r 标准 rSpecificationr r		r r r r
r r r r	r r 1r r	r r 谐振频率  rResonant frequencyr r	r r 55±1.0KHzr r		r r r r
r r r r	r r 2r r	r r 灵敏度  rSensitivityr r	r r ≥1.8Vp-pr r		r r r r
r r r r	r r 3r r	r r 余振  rRecay timer r	r r ≤2.20rms r r		r r r r
r r r r	r r 4r r	r r X轴方向角 rDirectivity(deg) X-axisr r	r r 90±15°r r		r r r r
r r r r	r r 5r r	r r Y轴方向角 rDirectivity(deg) Y-axisr r	r r 45±10°r r		r r r r
r r r r	r r 6r r	r r 静电电容 rCapacitancer r	r r 1500±15%pFr r		r r r r
r r r r	r r 7r r	r r 最大输入电压 rMax. Input Voltr r	r r 140Vp-pr r		r r r r
r r r r	r r 8r r	r r 平均无故障时间  rMean time to failurer r	r r 50000hsr r		r r r r
r r r r	r r 9r r	r r 工作温度  rOperating temperaturer r	r r -40～+80℃ r r		r r r r
r r r r	r r 10r r	r r 储存温度  rStorage temperaturer r	r r -40～+85℃ r r		r r r r
r r r r	r r r r	r r r r	r r r r	r r r r	r  r
r   r	r  r	r  r	r  r	r  r	r  r

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