Recommended Posts

第2聲為回音,而都卜勒效應作用在"聲音進入山洞中" [ V -0 / V - (V/10) ]*900 = 1000Hz

反射回來的時候觀察者沒有移動所以頻率不變...1000Hz入耳

:E我算也是這樣

人聽到的第一聲 是聲源(火車)傳出來的聲音 有都卜勒

聽到的第二聲是反射回來 聲源(山壁)和觀察者(人)都沒有移動

所以頻率就等於當初聲源(火車)傳到觀察者(山壁)也有都卜勒

所以是《人聽到第一聲》是晃子,而《人聽到第二聲》是火車進山洞前所發出的聲和山洞產生都卜勒效應,反射到靜止人耳裡。這樣想是正確的嗎?

大致上是這樣

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.