How and why is the volume so much louder in video commercials?
In: Technology
All sound is a wave. There are peaks and lows to the wave. The difference between the highest and lowest point in the wave is called dynamic range.
Using something called compression you can reduce the range of the sound. This can bring the lows up higher making the lows sound louder while keeping the peaks where they are.
For advertising, the compression is used very aggressively so it gets your attention more and drives home the message of the ad.
Compression technology has evolved over the years to allow more of it without distortion of the sound, and advertisers have taken advantage of this in a bad way.
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