外极化传声器 (200 V)

The 40AC is an IEC 61094 WS2F classified ½” externally polarized free-field, wide-frequency microphone with rear-venting. The prepolarized equivalent is GRAS 40AM.

GRAS 40AF 是一款 1/2" 外极化自由场传声器，用于测量中等频率下的中等声压级。其等效的 0 V 预极化型号是 GRAS 40AE。

40AG 是一款符合 IEC 61094 WS2P 标准、带后置通气孔的 1/2" 外极化压力场传声器。它是一款根据 IEC 61094-4 标准要求制造的高精度电容传声器，无论是在实验室还是生产环境中，都是耦合腔测量的理想选择。它极其坚固可靠，可测量高达 160 dB 的声压级，频率范围为 3.15 Hz - 20 kHz。

40AN 是 IEC 61094 WS2F 等级的 ½" 外部极化自由场低频传声器，带后通风装置。预极化等效产品是 GRAS 40AZ。

40AP 是一款符合 IEC 61094 WS2P 标准、带后置通气孔的 1/2" 外极化压力场传声器。它是一款根据 IEC 61094-4 标准要求制造的高精度电容传声器，无论是在实验室还是生产环境中，都是耦合腔和边界层测量的理想选择。它极其坚固可靠，可测量高达 160 dB 的声压级，频率范围为 3.15 Hz - 20 kHz。因其灵敏度高，它也可测量低至 16 dB(A) 的声压级。在需要时，40AP 也可用作随机入射场传声器。

The 40AR is an IEC 61094 WS2P/D ½" externally polarized random-incidence microphone with rear-venting. The 40AR is a high-precision condenser microphone made according to IEC 61094-4 requirements. It also fulfills the requirements of ANSI S1.4.

40AU-1 是一款符合 IEC 61094 LS2aP 标准、带后置通气孔的 1/2" 外极化参考级传声器。它是一款 1/2" 实验室标准级压力场传声器，是精密声压测量的理想选择。它带有符合 IEC 61094-1 标准规定的前腔，并随附一个保护性防尘罩。40AU-1 经过出厂校准，并附有一份校准图表，其中注明其具体的开路灵敏度和压力场频率响应。

The 40BF is an IEC 61094 WS3F ¼” externally polarized free-field microphone with rear-venting. The prepolarized equivalent is GRAS 40BE. NOTE: Optimized for use without protection grid—remove grid before measuring.

The 40BH is an IEC 61094 WS3P ¼" externally polarized high-pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its very low sensitivity and wide frequency response make it ideal for measuring very high sound pressure levels of up to 194 dB. It is extremely robust and reliable and can handle acoustic impulse measurements in frequencies of up to 20 kHz. NOTE: Optimized for use without protection grid—remove grid before measuring.

The 40BP is an IEC 61094 WS3P 1/4" externally polarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. It is a low-sensitivity microphone for sound measurements at high levels and high frequencies. Its low sensitivity makes it ideal for measuring high sound pressure levels of up to 174 dB. Its small size reduces the effects of diffraction and reflections around the microphone resulting in a frequency range extending up to 70 kHz. NOTE: Optimized for use without protection grid—remove grid before measuring.

40BP-FV 是一款符合 IEC 61094 WS3P 标准的 1/4" 外极化压力场传声器，带前置通气孔。它是一款根据 IEC 61094-4 标准要求制造的高精度电容传声器。它是一款低灵敏度传声器，适用于高声压级和高频下的声音测量。其较低的灵敏度使其成为测量高达 174 dB 高声压级的理想选择。其小巧的尺寸减小了传声器周围的衍射和反射效应，使其频率范围可扩展至 70 kHz。

40EN 是一款符合 IEC 61094 WS1P 标准的 1" 外极化压力场传声器。它是一款 1" 压力场传声器，是用于测试耳机的耦合腔测量的理想选择。嵌入式安装时，它可测量边界层的声压。它非常适合用作实验室标准级传声器。        

The 40DP is an IEC 61094 ⅛″ externally polarized pressure microphone with rear-venting. Due to its tiny size, this high-precision condenser microphone can be used to measure very high-frequency sounds without disturbing the sound field.