Overview
Sound (音, On)is a type of energy, the energy generated is transmitted through air or some other medium to reach the receiver.
It generally refers to what can be heard by the ear.
Sound is invisible, but is often represented by onomatopoeia, ripples, waveforms, musical notation, notes, etc.
Related Articles
Music Song Voice Sound Effect Tone Noise ASMR Sonic Ripple Waveform Sheet Music Musical Note Musical Instrument
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音とは (オトとは) [単語記事] - ニコニコ大百科 (NicoNico Encyclopedia)