sum_lecture08 - The Physics of Light& Sound Timbre Sound...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The Physics of Light & Sound Timbre, Sound Power and Sound Intensity Drs. Paulson and Scully How do we tell what instrument? • Timbre “Waveform” • How the sound “starts” “Attack Transients” Attack Transients From a Pipe Organ • From a pipe organ What is Each Frequency Doing? Take Away the Attack http://www.npr.org/player/v2/mediaPlay Sound Power • Measures how much energy per second (Power) a sound source puts into an acoustic wave • Remember- the energy of a wave is proportional to the amplitude SQUARED • Only depends on the source. It doesn’t matter where the listener is (or if there is one). • Energy per time is power. The SI units are a Watt. Sound Intensity • The sound power doesn’t tell you how loud you percieve something…. 1 meter 2 meters .003 s .006 s Sound Intensity • The amount of energy carried by a sound wave is proportional to the square of its amplitude. • The amount of energy transported past a given area of the medium per unit of time is known as the intensity of the sound wave. • Energy per time is a Watt and area is in meters squared so the units of intensity are W/m 2 . Sound Intensity • The faintest sound that the typical human ear can detect has an intensity of 1 x 10-12 W/m 2 known as the threshold of hearing . • A sound with an intensity of 1 x 10-12 W/m 2 corresponds to a sound which will displace particles of air by a mere one-billionth of a centimeter!...
View Full Document

{[ snackBarMessage ]}

Page1 / 28

sum_lecture08 - The Physics of Light& Sound Timbre Sound...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online