1. ശബ്ദത്തിൻറെ ഉച്ചത അളക്കാനുള്ള ഉപകരണം ഏത്? [Shabdatthinre ucchatha alakkaanulla upakaranam eth?]

Answer: ഡെസിബെൽ മീറ്റർ [Desibel meettar]
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