Sound waves slam into us constantly at more than 700 miles per hour.
to isolate the wearer from the noise around them. The average frequency range of human hearing is 20 to 20,000 Hz., who proved the existence of electromagnetic waves. equates to sound’s volume or intensity. Using our ocean analogy—because, hey, it works—amplitude describes the height of the waves.
We measure amplitude in decibels . The dB scale is logarithmic, which means there’s a fixed ratio between measurement units. And what doeswith evenly spaced steps on it numbered one through five. If the knob is following a logarithmic scale, the volume won’t increase evenly as you turn the dial from marker to marker. If the ratio is 4, let’s say, then turning the dial from the first to the second marker increases the sound by 4 dB.
Timbre is determined by the unique harmonics formed by the combination of notes in a chord. The A in an A chord is only its fundamental note—you also have overtones and undertones. The way these sound together helps keep a piano from sounding like a guitar, or an angry grizzly bear from sounding like a rumbling tractor engine. But we also rely on envelopes, which determine how a sound’s amplitude changes over time.
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