How many letters does the top answer for “device for converting sound waves into electrical energy” have?

The most common answer is mic (3 letters).

Crossword clue: device for converting sound waves into electrical energy

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

mic 3 letters wn-def

device for converting sound waves into electrical energy

microphone 10 letters wn-def

device for converting sound waves into electrical energy

mike 4 letters wn-def

device for converting sound waves into electrical energy