Sound signal in time domain: Loudness at SINUS

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(*) Schaldruck = pressure  (*) Teit = time
 

If you turn the volume knob on the radio, the music becomes softer or louder.

What changes in the sound signal?

If you make the music louder, the amplitude will increase or decrease, as the animation shows.

The frequency of the SINUS signal remains constant for the time being.

What the frequency is responsible for in music is shown in the next chapter. First of all it is only about the volume. With a SINUS signal, the peak amplitude is proportional to the volume.

What corresponds to the volume when we take a real music signal with noise, as the next page shows?