High or Loud?
Pitch vs loudness — and a string to prove it
What this lesson covers
Why it matters
Turn a guitar's tuning peg and the note climbs. Pluck harder and it just gets LOUDER — same note. Two completely different controls, endlessly confused.
The idea in plain words
The musician's physics. Tap the knobs.
pitch ← frequency · loudness ← amplitude
Why does a sitar have frets along its neck?
The neck is a frequency ruler
- pitch knobs: shorter / tighter / thinner — each raises a string's frequency — the three tuning tricks
- loudness knob: pluck harder — bigger swing, same rate — louder, not higher
- build it: musical toy — stretch rubber bands over a box: different lengths = different notes — a shoebox sitar
- Each fret sets a different vibrating length
- f ∝ 1/length: shorter = higher note
Predict first
Shortening a vibrating string (fretting it) makes the sound…
Length changes FREQUENCY → pitch. How hard you pluck changes AMPLITUDE → loudness. The two never trade jobs.
- higher pitched — shorter strings vibrate faster — correct
- louder
- slower to reach you
What you do
Tune the string to middle C (256 Hz), then find the octave above — length and tension are your pegs.
Check yourself
A mosquito's whine is higher-pitched than a lion's roar because the mosquito's wings…
Hundreds of wingbeats a second vs a slow deep roar — frequency IS pitch.
Pluck the same string gently, then hard. What changes?
The string's length and tension set the note; your pluck only sets the volume — and loudness is measured in DECIBELS (dB).
A drum, a flute and a sitar make sound from…
Three instrument families, one rule: something must vibrate. A single unchanging frequency (like a tuning fork) is a MONOTONE.
- vibrate far more times per second — correct
- are louder
- are closer to you
- loudness (amplitude) — the note stays the same — correct
- pitch rises when plucked hard
- both change equally
- a stretched MEMBRANE, a vibrating AIR column, and vibrating STRINGS — correct
- strings in all three
- electricity