你的鼓膜开始震动，以440次每秒的频率，你们听到音调。

Your eardrum oscillates 440 times per second — you hear this tone.

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声波降调的可能性增加，并且随着鼓膜双次振动带来的反馈效应，音高也会随之降低。

This added resistance causes the waveform frequency to drop, lowering the pitch of the sound you hear internally and creating a sort of feedback effect that stimulates the eardrum from both sides.

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