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笔者的组合音响采用两个小型音箱,一次,不慎将其中一只喇叭的纸盆捅了一个窟窿。此后,虽然将此窟窿又粘好了,但用它放音时,只要放音音质开大一些,在900Hz音频附近总是出现异常的蜂音,严重影响了放音质量。这种现象可以认为是由于喇叭纸盒破损后,整个纸盆活动系统的质量和弹性分布出现了不均匀性,而造成了对放音频率的异常谐振。为了继续利用这只喇叭,笔者利用串联揩振的原理,在此喇叭接线端子上并联了一个串联谐振回路,以抑制喇叭的异常谐振峰。经实验证明,该
The author’s combination of audio using two small speakers, once, accidentally one of the speaker’s paper pot stabbed a hole. Since then, although this hole and sticky, but use it to play, as long as the playback sound quality bigger, in the vicinity of 900Hz audio always appear abnormal buzz, seriously affecting the playback quality. This phenomenon can be attributed to anomalous resonance of the sound emission frequency due to the unevenness in the mass and elastic distribution of the active system of the cone when the horn box is damaged. In order to continue to use this speaker, I use the principle of series 揩 vibration in this speaker terminals in parallel with a series resonant circuit to suppress the abnormal resonance peak speakers. The experiment proved that