Human beings can intuitively recognize the physics of music. Check out these basic connections between music and physics that explain what we’re hearing!
10 Connections Between Physics and Music
Guns N Roses November Rain Sungha Jung
Bourgade Bell Choir plays Eye of the Tiger
Eye of the Tiger on piano
Fife Player on the Streets of Boston at Night
Guns n Roses - November Rain - Piano Cover
Guns n Roses - November Rain
Guns n Roses - November Rain - David Wong - Violin Cover
High speed longitudinal wave on a slinky spring
Phil Collins - In The Air Tonight LIVE HD
Life in the Fast Lane (A Blues Shuffle)
Longitudinal Wave Propagation on a Slinky
Paint on a Speaker at 2500fps - The Slow Mo Guys
PELLEK's 4 OCTAVE VOCAL RANGE (d2-c6)
PS22 Chorus "EYE OF THE TIGER" Survivor
River Surfing - Surfing a standing wave on the Eisbach
Standing Waves Part I Demonstration
Transverse and Longitudinal Waves
Wine glass resonance in slow motion
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* Okay, so that speaker? For a moment during its vibration it has a greater than normal concentration of air molecules in the region next to it. This is a region of compression, that moves outward as the energy from those molecules is transferred to others farther and farther away from it. These regions are naturally louder spots near the speaker, while the spots where the music is softer are regions of rarefactions. And when regions of compression and rarefactions come together there is almost no sound at all. Dead spots like these can actually be designed into buildings by architects, especially when they use materials like wall padding that absorbs sound waves. Each compression and the following rarefaction makes up what we call one “cycle.”
* These cycles are important because by measuring how many occur in a single second, we can determine the soundwave’s frequency. This indicate how rapidly or slowly the medium is vibrating as the wave passes through it. “Hertz” is the unit of measurement we use for frequency. For instance, a single vibration per second is 1 Hertz. Human ears are constructed so that they’re really good at hearing fluctuations in frequency, detecting sounds as low as 15 hertz and as high as 20,000 Hertz. We refer to these high and low ends as “pitch,” and when you play specific frequencies together they can create appealing sounds. For instance if there’s two waves and the second has twice the frequency of the first, we denote this as a ratio of 2:1, also known as an octave. With instruments you can create all kinds of different ratios, blending together the sound waves to make music!
* What’s also important about frequency is that every material (whether it’s wood, glass or even steel) has a natural frequency that it vibrates at in resonance. Putting energy into any substance at its resonant frequency will force it to vibrate. When we’re making music with instruments, the shape, size and material determine what sounds it can create. The sound waves that fit inside, subsequently resonate and get louder. That’s why tubas resonate at low frequencies, while something like a piccolo resonates at high, piercing frequencies.
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