Home

This movie is part of the collection: Prelinger Archives

Producer: Coronet Instructional Films
Sponsor: N/A  Audio/Visual: Sd, B&W
Keywords: Perception: Sound

Creative Commons license: Public Domain

Sound__Wavelength.mp4

E.  Wave Front – locus of adjacent points on a wave which are in phase

Top View

Ex) Distance between arrows
= .90 cm

Wavelength of  wave?

λ = .30 m

III. Periodic Wave Phenomena

- Paul Hewitt

Beats - When Sounds Overlap
(Video)

- Bob Barrett

Interference – effect produced by two waves passing simultaneously through a region

1. Superposition – when waves overlap, the resultant displacement is the algebraic sum of the individual displacements of each wave

Superposition

Monterey Institute

a) Constructive Interference

Constructive Interference

(Jason P. - 2005)

1)

2)

Amplitude?

2A

3)

Waves reemerge as separate waves

Constructive Interference II

(R. Meija - 2005)

b) Destructive Interference

Destructive Interference

(Jason P. - 2005)

1.

2.

At moment of overlap, amplitudes cancel (for a moment)

3.

Waves reemerge as separate waves

As the two waves below pass through each other, the medium at point P will ...

June 2004

(4) remain stationary

What will the amplitude of the resultant wave be when wave A and B meet at point X?

Jan. 2004

+1

What is the amplitude of the wave produced when these waves overlap?

June 2009

15 cm

Interf. Pattern

Interference -  1 | 2 | 3 |

(Right Click, Save As, Open)

Doane College

©Tony Mangiacapre.,-All Rights Reserved [Home] Established 1995 - Use any material on this site (w/ attribution)