2007 week 1 2
Download
Skip this Video
Download Presentation
2007 - Week 1.2

Loading in 2 Seconds...

play fullscreen
1 / 39

2007 - Week 1.2 - PowerPoint PPT Presentation


  • 47 Views
  • Uploaded on

2007 - Week 1.2. Some Fundamental Items from PHYSICS. Assignment-. Begin reading the Background Notes that are posted on the website. Roughly pages 1-18. From Our Discussion. Elements of Music Structured/Designed Sound Some pleasant – bells, most musical instruments Some nasty – whip

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '2007 - Week 1.2' - shelby


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
2007 week 1 2

2007 - Week 1.2

Some Fundamental Items from

PHYSICS

assignment
Assignment-
  • Begin reading the Background Notes that are posted on the website.
  • Roughly pages 1-18
from our discussion
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
    • Pleasurable ????
    • Message ???? Must there be one? What Kind?
bone flute music is older than i am
Bone Flute – Music is older than I am!

50,000 years or more

Neanderthal

reconstructions

lightening
Lightening
  • Takes time to get to you or you are in big trouble.
    • Speed = distance/time
    • What is distance?
    • What is time?
important definitions
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

systems of units
Systems of Units
  • SI Units …. Meters, Seconds, Newtons/Kilograms
  • English System ….. Feet/yards, seconds, pounds/poundals
more important definitions
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
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
In case you care…..

We will discuss this “g-thing” when we

get to acceleration.

and so on
And so on …

Rolex (~$10K) Atomic Clock (NASA) $ megabucks

the music clock the metronome
The music clock: the Metronome

112 quarter notes per minute.

Tempo

Kind of

Pendulum

and you didn t even know that you have one
And you didn’t even know that you have one!

Sound Waves push against

your

TympanicMembrane

What is a wave, what is a push??

in order to understand musical tones and their relationship to each other we need to understand

In order to understand musical tones and their relationship to each other, we need to understand

GRAPHS!

a graph what does it all mean
100

snail

distance (meters)

50

rabbit

1

2

time (seconds)

A graph … what does it all mean?
slide25
100

snail

distance (meters)

50

rabbit

1

2

time (seconds)

So….

Snail goes 100 meters in

2 seconds …

Speed=100m/2s

Speed = 2 meters/second

slide27
Also
  • Velocity is speed in a particular direction.
  • Velocity: 120 m/hr NORTH
  • Speed: 120 m/hr (or mph)
example
Example
  • Sound travels about 1100 ft per second.
  • How much time does it take for sound to travel about 1 mile?
another graph a biggy
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 definitions1
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:

slide31
1.5

1

0.5

disturbance

0

0

5

10

15

20

25

-0.5

-1

-1.5

Time (seconds)

Period = 6 seconds

Frequency=1/6 per sec (Hz)

=0.16 sec = 160 ms

6 sec

resonance later
Resonance (later)

Loudness

Rotational Speed

(Turns/second)

slide37
Piano

Keyboard

slide39
Next ...

Fun with Strings

ad