Precision Acoustics NH4000：4.0 毫米针式水听器

Precision Acoustics NH4000：4.0 毫米针式水听器 4.0 mm needle hydrophone

Precision Acoustics NH4000 Although optimised for lower frequencies, the 4.0 mm needle hydropphone can be used for higher frequency measurements (particularly of very weak signals).

Precision Acoustics NH4000虽然针对较低频率进行了优化，但 4.0 毫米针式水力喷头可用于更高频率的测量(尤其是非常微弱的信号)。

In such situations the inherent directivity and spatial averaging characteristics of a 4 mm aperture means that care should be taken in interpreting data.

在这种情况下，Precision Acoustics NH4000 4 毫米孔径固有的方向性和空间平均特性意味着在解释数据时应小心。

All dimensions are in mm. All probes are hand made and as such there is always some variation between individual devices.

Precision Acoustics NH4000所有尺寸均以毫米为单位。所有探头都是手工制作的，因此各个设备之间总是存在一些差异。