自由场传声器
自由场传声器设计使其在自由场中具有平直的频率响应。自由场传声器通常用于消声室或远离反射建筑物等的声学测量。自由场传声器的另一个应用是通用电声测量,如扬声器和麦克风测量。
自由场传声器设计使其在自由场中具有平直的频率响应。自由场传声器通常用于消声室或远离反射建筑物等的声学测量。自由场传声器的另一个应用是通用电声测量,如扬声器和麦克风测量。
压力场是指在场内任何位置的声压具有相同的幅值和相位。小腔体(相对于波长而言较小)可实现与压力场非常相似的声场,例如人工耳。
压力场传声器通常用于耦合腔、风洞或嵌入式测量中。
消声室的反义词是混响室,其所有表面都尽可能地坚硬且具有反射性,并且不存在平行表面。这会产生一个扩散场,因为所有声波都以相同的概率和强度从各个方向同时到达。
在硬墙建筑等环境中,可以实现与扩散场非常相似的声场,这些环境中存在许多同时的声音或噪声源,例如车内测量和教堂内。
如果您不确定自己所在的声场类型,最好假设它是扩散声场,以尽量减少测量误差。扩散声场传声器通常用于测量车辆内部噪声或建筑声学。
Types 4160 and 4180 are both high stability condenser microphones for laboratory standard applications and in coupler measurements.
Type 4160 has been used for some time in such applications and conforms to IEC 327 and 402, ANSI S1.12-1967 and ANSI Sl.lO-1966, JIS C 5515, and the current IEC draft standard for 1” laboratory standard microphones. It has become established as a high precision reference standard and is used in the medium frequency ranges and for measurements at low sound pressure levels.
Type 4180 has been developed to meet a growing need for a laboratory standard ½" microphone which enables measurements at higher frequencies and at higher sound pressure levels. It has been designed to comply with the most recent drafts of laboratory standard microphone standards. Types 4160 and 4180 are delivered with individual calibration charts.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.