फ़ोनोमीटर
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(aangrezi:Phonometer) fonomitar ek vaijnanik upakaran hai. dhvani-lekhan ke kam ane vale upakaran ko kahate haian.
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(aangrezi:Phonometer) fonomitar ek vaijnanik upakaran hai. dhvani-lekhan ke kam ane vale upakaran ko kahate haian.
|
|
|
|
|