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                                                                                                                                                                                  北創高清鏡頭,大量批發

                                                                                                                                                                                  熱門關鍵詞:工業鏡頭,手機鏡頭,安防鏡頭,鏡片加工,檢測儀器

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                                                                                                                                                                                  【北創鏡頭】“看到”聲音:科學家用顯微鏡播放老唱片

                                                                                                                                                                                  作者: 編輯: 發布日期:2018年08月01日 09:38:06
                                                                                                                                                                                  信息摘要:
                                                                                                                                                                                  如何傾聽一張老唱片中的聲音?你可能會說,只要找到一臺留聲機,把它播放出來就好了嘛?!?/div>

                                                                                                                                                                                        OFweek光學網訊:如何傾聽一張老唱片中的聲音?你可能會說,只要找到一臺留聲機,把它播放出來就好了嘛。但實際情況卻沒有這么簡單?,F在,很多老唱片都面臨著保存不善、折斷破損的危機,如果這些記錄載體損毀,其中的音頻資料也將隨之失傳?! 《鍪终冗@些老唱片的,則是兩位在LHC(大型強子對撞機)工作的粒子物理學家。通過顯微鏡和計算機,他們讓破損的老唱片也得以重獲新生?! o法播放的記錄  在照相機出現之前,藝術家們利用繪畫和雕刻也可以較為精細地還原自己所看見的場景,而相比之下,記錄和還原聲音則要面臨更多技術挑戰。

                                                                                                                                                                                    1860年,法國人斯科特(édouard-LéonScottdeMartinville)第一次成功地將聲音用現代方法記錄了下來。他根據人耳的構造設計出了一架聲波記錄儀,其三個主要結構分別對應耳道、耳膜和聽小骨。聲音是機械振動,聲波傳送到儀器中,然后連接在一個膜上面的鬃毛類部件(與聽小骨對應)就可以把振動記錄在涂有燈黑(炭黑)的紙張或者玻璃上?! ⊥ㄟ^這樣的方式,斯科特得到了下圖中的聲波曲線記錄圖。這種記錄圖中確實包含著聲音的信息,但它卻無法被還原播放。

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