【題目】下列關(guān)于聲音的產(chǎn)生和傳播說(shuō)法正確的是（ ）

A．物體不振動(dòng)也可以發(fā)出聲音

B．空氣不能充當(dāng)傳播聲音的介質(zhì)

C．聲音在真空中的傳播速度為340m/s

D．音調(diào)與聲源物體振動(dòng)的快慢有關(guān)

【答案】D

【解析】

試題分析：聲音是發(fā)聲體振動(dòng)產(chǎn)生的，一切發(fā)聲的物體都在振動(dòng)；

聲音的傳播需要介質(zhì)，它既可以在氣體中傳播，也可以在固體和液體中傳播；

聲音的高低叫音調(diào)，音調(diào)與發(fā)聲體振動(dòng)的快慢有關(guān)，振動(dòng)越快音調(diào)越高．

解：

A、聲音是發(fā)聲體振動(dòng)產(chǎn)生的，物體不振動(dòng)不能發(fā)出聲音，此選項(xiàng)錯(cuò)誤；

B、固體、液體和氣體都可以作為聲音傳播的介質(zhì)，聲音可以在空氣中傳播，此選項(xiàng)錯(cuò)誤；

C、聲音傳播需要介質(zhì)，真空不能傳聲，此選項(xiàng)錯(cuò)誤；

D、音調(diào)與聲源振動(dòng)的快慢有關(guān)，振動(dòng)越快音調(diào)越高，此選項(xiàng)正確．

故選D．

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