285lect27 - 1 Lecture 28 Example 1 (Continue) Consider mx00...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 where Beats. Remark 2 The physical phenomenon of beats refers to the to the periodic cancellation of sound at a slow frequency. Remark 3 Recall that the tuning fork is designed to produce a very pure tone, with most of the vibration at the so called fundamental frequency, and 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
little vibration at harmonic overtones. When the fork is struck, little of the energy goes into the overtone modes; they also die out correspondingly faster, leaving only the fundamental tone. It is easier to tune other instruments with this pure tone. Tuning fork. Consider two almost identical tuning forks, the &rst one slightly out of tune with the second. An interference occurs during a very small interval; so, as we hear the resulting sound, it appears that the sound stops periodically, only brie±y, and then starts again with a beat, a section that is instantaneously loud again. So, there is no sound when A ( t ) = 2 F 0 m ! 2 & ! 2 0 sin ! 0 & ! 2 t is zero (or almost zero); this is when destructive interference occurs. When ! 0 & ! is small compared to ! 0 , there are long intervals between the zeros
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

285lect27 - 1 Lecture 28 Example 1 (Continue) Consider mx00...

This preview shows document pages 1 - 3. Sign up to view the full document.

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