Frequency: The number of vibrations per second, Measured in Hertz (Hz), High pitch, Low pitch, Different number of waves seen, Amplitude: The size of the vibration, Measured in decibels (dB), Loud, Soft, Different heights of waves seen,

Frequency and amplitude

由 匿名

排行榜

视觉风格

选项

切换模板

恢复自动保存: