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声学楼论坛 http://www.nju520.com/bbs/
此主题相关图片如下:hac.jpg
还并联?????
HAC-100, $495.00 - Hearing Aid Compatibility Probe
The Hearing-Aid Compatibility Act of 1988 requires that telephone sets be compatible with hearing aids. CCL has developed a measurement probe to assist in the making of magnetic field intensity measurements as required by the FCC and Canada. The specified pick-up coil has been mounted in a probe that places the pick-up coil in the axial and radial orientations at the proper distances from the telephone set receiver. The model HAC 100 includes an Axial Test Probe(A100), a Radial Test Probe(R100), Instruction Manual and Storage Bag.
H也跟面积和导磁材料有关.
基本是对的.
shou jiao
带辐射音圈的受话器辐射磁场强度的计算公式如下: