Question

which part of harmonium vibrates to produce sound ?​

Answer 1

Answer:

Explanation: Harmonium, also called Reed Organ, free-reed keyboard instrument that produces sound when wind sent by foot-operated bellows through a pressure-equalizing air reservoir causes metal reeds screwed over slots in metal frames to vibrate through the frames with close tolerance.

Answer 2

Answer:

metal reeds

Explanation:

The metal reeds which are connected to the frame of the harmonium are the vibrating parts of the harmonium