The loudness of a sound is evidently produced by how much the membrane is cause to move.
The loudness of a sound is evidently produced by how much the membrane is cause to move.
而声音的大小则明显的决定于耳膜运动。
The loudness of a sound is evidently produced by how much the membrane is cause to move.
而声音的大小则明显的决定于耳膜运动。