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Week 1.2. Some Fundamental Items from PHYSICS. From Our Discussion. Elements of Music Structured/Designed Sound Some pleasant – bells, most musical instruments Some nasty – whip Some intermediate - drums Rhythm (time) Tones (Not defined, though)
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Week 1.2 Some Fundamental Items from PHYSICS
From Our Discussion • Elements of Music • Structured/Designed Sound • Some pleasant – bells, most musical instruments • Some nasty – whip • Some intermediate - drums • Rhythm (time) • Tones (Not defined, though) • Loudness (not actually listed, nor defined) • Pleasurable ???? • Message ???? • We listened to some interesting samples of music. We will be listening to much more.
Bone Flute – Music is older than I am! 40,000 years or more Neanderthal
Lightening • Takes time to get to you or you are in big trouble. • Speed = distance/time • What is distance? • What is time?
Important Definitions • Length or Distance • How “far” something moves or travels. • Measured against some agreed upon standard. Length Standard .. The Gorf 1 2 3 4 1/8 = 4 1/8 Gorfs Unknown Length
The real standard: The Meter
Systems of Units • SI Units …. Meters, Seconds, Newtons/Kilograms • English System ….. Feet/yards, seconds, pounds/poundals
More Important Definitions • TIME • The subjective “distance” between two EVENTS. • It needs to be objective … ie measurable and reproducible. • Original Clock – The Earth’s Rotation • “It is two days journey” • Today’s Clocks – • “He ran the race in 4 hours, 2 minutes and 21.85 seconds”
Things that “tick” at some rate • The planet … once a day • The Pendulum .. Depends on a number of things; • Parameters: Mounting Length Weight, whatever that is.
In case you care We will discuss this “g-thing” when we get to acceleration.
And so on … Rolex (~$10K) Atomic Clock (NASA) $ megabucks
The music clock: the Metronome 112 quarter notes per minute. Tempo Kind of Pendulum
And you didn’t even know that you have one! Sound pushes against your TympanicMembrane
D d Inside your head To Brain
100 snail distance (meters) 50 rabbit 1 2 time (seconds) A graph … what does it all mean?
1.5 1 0.5 0 disturbance 0 5 10 15 20 25 -0.5 -1 -1.5 Time (seconds) Another Graph .. a biggy!
Important Definitions The PERIOD, T is the time it takes to go from one condition to the next time that exact condition is repeated. The frequency, the number of oscillations per second, is given by:
Resonance (later) Loudness Rotational Speed (Turns/second)
Piano Keyboard
Next ... Fun with Strings