声级计又叫(噪音计)是噪声测量中最基本的仪器。声级计一般由电容式传声器、前置放大器、衰减器、放大器、频率计权网络以及有效值指示表头等组成。声级计的工作原理是:由传声器将声音转换成电信号,再由前置放大器变换阻抗,使传声器与衰减器匹配。放大器将输出信号加到计权网络,对信号进行频率计权(或外接滤波器),然后再经衰减器及放大器将信号放大到一定的幅值,送到有效值检波器(或外按电平记录仪),在指示表头上给出噪声声级的数值。
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The Model 91 (Class 1) and Model 92 (Class 2) are the ideal choice for noise measurements for compliance with the Noise a…
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The Models 83 & 84 sound level meters, like all other Pulsar instruments are high performance instruments which appeal to…
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The Models 81CA & 82CA are the ideal instruments for those who do not want an instrument with 1:1 Octave Band Filters whe…
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When using the Assessor Models 81A or 82A making a measurement couldn’t be easier; simply switch the unit on and the ins…
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Noise measurement adapted to dB(A) weighting.
Compact and light, easy to take to any site.
Access…
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用于一般噪声测量,还可用作声学测量的前置放大器。
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BK8650噪音计
■CE认证合格 ■携带方便、单手可操作 ■AC及DC输出功能 ■A及C频率加权 ■慢速及快速时间加权 ■最大值锁定功能 ■…
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供电 9V碱性电池或者电源适配器 4节1.5VAA碱性电池或6V电源适配器
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CEL-240数字式声级计,采用先进的DSP技术,符合ANSI和IEC Type 2的精度要求,测量范围30~130dB,动态范围70dB。适用于多领域的日…
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CEL-240数字式声级计,采用先进的DSP技术,符合ANSI和IEC Type 2的精度要求,测量范围30~130dB,动态范围70dB。适用于多领域的日…
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