é³ç®±ä¸çæ¬å£°å¨ä¿ç§°ååï¼ä¸»è¦åä¸ºå ¨é¢ååååé¢åå两大类ãå¤è§ä¸åºåï¼å ¨é¢åååªæä¸ä¸ªååï¼åé¢ååå ç½®çé常é½æ¯åé¢ååæè æ¯ä¸é¢ååï¼ä¸äºæ¯è¾é«ç«¯çååæ°éæ´å¤ã
1ãå ¨é¢ååæ¯æé¢ççèå´å®½ï¼è¦çé¢å¹¿ï¼ä»¥åçå ¨é¢åå涵ççé¢çèå´æ¯200â10000Hzï¼è¿å¹´æ¥éç声å¦ææ¯ä¸æå¾å°è¿æ¥ï¼ç°å¨ä¸è¬çå ¨é¢ååé½å¯ä»¥è¾¾å°50â25000Hzçé¢çèå´ï¼æäºé³ç®±çä½é¢å¯ä»¥ä¸æ½è³30Hzãå¬å°ç声é³æ¯è¾å¹³é¢ï¼ç«ä½æ没æé£ä¹å¼ºã
2ãåé¢é³ç®±çæé æ¯è¾å¤æï¼ååæ°éå¤ï¼éé¢è®¾ç½®æç¬ç¹çåé¢å¨ãåé¢ååçé¢çæ´æ侧éç¹ï¼è½å¤ä½¿é«ä½é³ç延伸æ´å®½ï¼å èé常è½å¤è¦çå°æ¯å ¨é¢ååæ´å¹¿çé¢çèå´ãä½æ¯å£°é³çé³åºæ²¡æé£ä¹çº¯åï¼æ´ä½çé³è²ä¹ä¼åçåå·®ã
å ¨é¢é³ç®±å°±å¥½æ¯ä¸ä¸ªäººæææçæ´»é½å¹²å®äºï¼èåé¢é³ç®±åå°ä¸åçæ´»å®æç»ä¸åç人æ¥å¹²ï¼ç±äºæ¯ä¸ªäººçè½å侧éç¹ä¸åï¼æ以å¦æè¿ä¸ä¸ªäººè¢«æ°å¥½åé å°éåèªå·±å¹²çæ´»èä¸é½æç §åä¸æ¹åå»åªåï¼é£ä¹èªç¶æ´»å¹²å¾æ¼äº®èä¸æçä¹æ´é«ãä½æ¯å¦æä¸æ¯é½å¿ååï¼äººå¤åèä¼äºç¸å¹²æ°ï¼æ为累èµã