声波
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(声(shēng )波(bō ),声(shēng )波(bō ))
能(néng )引(yǐn )起(qǐ )听(tīng )觉(jiào )的(de )振(zhèn )动(dòng )波(bō ),频(pín )率(lǜ )在(zài )20--20,000赫(hè )兹(zī )之(zhī )间(jiān )。一(yī )般(bān )在(zài )空(kōng )气(qì )中(zhōng ),也(yě )可(kě )以(yǐ )在(zài )液(yè )体(tǐ )或(huò )固(gù )体(tǐ )中(zhōng )传(chuán )播(bō ),有(yǒu )反(fǎn )射(shè )和(hé )折(shé )射(shè )现(xiàn )象(xiàng ),在(zài )真(zhēn )空(kōng )中(zhōng )不(bú )能(néng )传(chuán )播(bō )。
毛(máo )泽(zé )东(dōng )《在(zài )省(shěng )市(shì )自(zì )治(zhì )区(qū )党(dǎng )委(wěi )书(shū )记(jì )会(huì )议(yì )上(shàng )的(de )讲(jiǎng )话(huà )》二(èr ):“太(tài )阳(yáng )的(de )光(guāng )射(shè )来(lái )叫(jiào )光(guāng )波(bō ),无(wú )线(xiàn )电(diàn )台(tái )发(fā )出(chū )的(de )叫(jiào )电(diàn )波(bō ),声(shēng )音(yīn )的(de )传(chuán )播(bō )叫(jiào )声(shēng )波(bō )。”
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