http://iet.metastore.ingenta.com
1887

Wave Reflection and Standing Waves

Wave Reflection and Standing Waves

For access to this article, please select a purchase option:

Buy chapter PDF
$16.00
(plus tax if applicable)
Buy Knowledge Pack
10 chapters for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
Fundamentals of Wave Phenomena — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

When a ball hits a hard wall, it is reflected by the wall. This reflection phenomenon can alternatively be interpreted in terms of the reflection of energy and momentum associated with the ball. If the wall is soft, the collision is inelastic and the wall completely absorbs the energy and momentum of the ball. No reflection occurs in this case. As we have seen, waves carry energy and momentum and whenever waves encounter an obstacle, they are reflected by the obstacle. Echoes are caused by the reflection of sound waves. Radars use the reflection of electromagnetic waves (microwaves) from metal objects such as airplanes. Wave reflection gives rise to an important wave phenomenon called standing waves, which play essential roles in most musical instruments. As the name indicates, standing waves do not propagate and therefore are not associated with energy and momentum transfer. They essentially behave as spatially distributed oscillators that only store energy. They can create waves in a surrounding medium by radiation. For example, the strings in a piano oscillate with distinct frequencies that are determined by the length, tension, and mass of each string. Each string can create sound waves in air with a particular frequency.

Chapter Contents:

  • 6.1 Introduction
  • 6.2 Reflection at a Fixed Boundary, Standing Waves
  • 6.3 Reflection at a Free Boundary
  • 6.4 Theory of Wave Reflection, Mechanical Impedance
  • 6.5 Problems

Inspec keywords: musical instruments; acoustic wave propagation; echo; acoustic wave reflection

Other keywords: sound waves; radars; piano; electromagnetic waves; standing waves; microwave reflection; musical instruments; echoes; momentum; spatially distributed oscillators

Subjects: Music and musical instruments; Nonlinear acoustics and macrosonics; General linear acoustics

Preview this chapter:
Zoom in
Zoomout

Wave Reflection and Standing Waves, Page 1 of 2

| /docserver/preview/fulltext/books/ew/sbew044e/SBEW044E_ch6-1.gif /docserver/preview/fulltext/books/ew/sbew044e/SBEW044E_ch6-2.gif

Related content

content/books/10.1049/sbew044e_ch6
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address