Login | Signup now       

Guest

 Click to see how  

HOME | VIDEOS | DOCUMENTS | COLLECTIONS | UPLOAD | BROADCAST | MY ACCOUNT | FEEDBACK | ABOUT

Share  Title: Doppler Effect

 
iConnect (Beta)   |  Like   |    Sponsor  |   Comment   |    Report  

Related Profiles

If you are an author or an inventor or an individual related to the work displayed in this video, you can click on the 'add me as' button to link your researchusa profile to this entry. Doing so automatically puts you on the iConnect network bringing great visibility to all your related work.

    
 
Article

View Cross Ref (Beta)

Your Edit is Valuable. Editor's names show on Edit pannel.Edit this article  

 

The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the change in frequency of a wave for an observer moving relative to the source of the waves. It is commonly heard when a vehicle sounding a siren approaches, passes and recedes from an observer. The received frequency is higher (compared to the emitted frequency) during the approach, it is identical at the instant of passing by, and it is lower during the recession. For waves that propagate in a medium, such as sound waves, the velocity of the observer and of the source are relative to the medium in which the waves are transmitted. The total Doppler effect may therefore result from motion of the source, motion of the observer, or motion of the medium. Each of these effects is analyzed separately. For waves which do not require a medium, such as light or gravity in general relativity, only the relative difference in velocity between the observer and the source needs to be considered. Doppler first proposed the effect in 1842 in his treatise "Über das farbige Licht der Doppelsterne und einiger anderer Gestirne des Himmels" (On the coloured light of the binary stars and some other stars of the heavens).[1] The hypothesis was tested for sound waves by Buys Ballot in 1845. He confirmed that the sound's pitch was higher than the emitted frequency when the sound source approached him, and lower than the emitted frequency when the sound source receded from him. Hippolyte Fizeau discovered independently the same phenomenon on electromagnetic waves in 1848 (in France, the effect is sometimes called "effet Doppler-Fizeau"). In Britain, John Scott Russell made an experimental study of the Doppler effect (1848). An English translation of Doppler's 1842 treatise can be found in the book The Search for Christian Doppler by Alec Eden.

 

 
Related Documents
NOTAR Helicopter
Experimental Study of Compressible Pipe Flow with Friction and Heat Addition
Blind De-convolution of BPSK and QPSK modulated signal using Constant Modulus Algorithm (CMA).
Laminar Separation Bubble
 
Member Documents
 

Keywords
Doppler  Sound  
 
 About This Video
 
 Subject Physics
 Category Demonstration
 Duration 00:02:59
 Views 3272
 Added 26-08-09
 Contributor    reberg
 Add to Favourites
 Report Abuse
 
 Related Videos
 See More

Echo

 RunTime  00:06:36
 Uploaded  04-05-09
 Views  4405
   
 Echo Cardio Gram and Colo...

Wind

 RunTime  00:02:00
 Uploaded  19-11-07
 Views  3318
   
 Wind Shear

Effect

 RunTime  00:04:09
 Uploaded  12-11-09
 Views  3340
   
 Effect of gas on voice

The

 RunTime  00:02:09
 Uploaded  26-12-07
 Views  3250
   
 The physics of sound

Leaping

 RunTime  moderate
 Uploaded  10-09-10
 Views  4018
   
 Leaping shampoo and the s...

Speed

 RunTime  00:04:04
 Uploaded  25-08-09
 Views  3511
   
 Speed of Sound

Damped

 RunTime  moderate
 Uploaded  26-06-12
 Views  1774
   
 Damped Oscillations

Ruben's

 RunTime  00:02:48
 Uploaded  25-11-07
 Views  3455
   
 Ruben's Tube

Sound

 RunTime  00:03:11
 Uploaded  26-08-09
 Views  4273
   
 Sound Refraction - Sound ...

Rijke

 RunTime  moderate
 Uploaded  26-06-12
 Views  1828
   
 Rijke Tube

CO2

 RunTime  00:01:55
 Uploaded  10-01-08
 Views  3536
   
 CO2 emissions and climate...

Audible

 RunTime  moderate
 Uploaded  26-06-12
 Views  1719
   
 Audible Frequency Range

Beats

 RunTime  00:04:44
 Uploaded  26-08-09
 Views  3229
   
 Beats

Aerodynamics

 RunTime  00:00:02
 Uploaded  19-10-07
 Views  3639
   
 Aerodynamics

Sound

 RunTime  00:04:44
 Uploaded  25-08-09
 Views  3750
   
 Sound Reflection from Con...

Standing

 RunTime  00:07:51
 Uploaded  26-08-09
 Views  3195
   
 Standing Sound Waves

Diffraction

 RunTime  00:05:54
 Uploaded  26-08-09
 Views  3087
   
 Diffraction

Sound

 RunTime  00:03:31
 Uploaded  25-08-09
 Views  3880
   
 Sound Propagation in Vacu...

 Member Videos
 See More

Sound

 RunTime  00:03:11
 Uploaded  26-08-09
 Views  4273
   
 Sound Refraction - Sound ...

Sound

 RunTime  00:03:31
 Uploaded  25-08-09
 Views  3880
   
 Sound Propagation in Vacu...

Audio

 RunTime  00:09:16
 Uploaded  12-11-09
 Views  3823
   
 Audio Spectrograms

Shive

 RunTime  00:08:29
 Uploaded  26-08-09
 Views  3795
   
 Shive Wave Machine - Stan...

Sound

 RunTime  00:04:44
 Uploaded  25-08-09
 Views  3750
   
 Sound Reflection from Con...

Standing

 RunTime  00:09:58
 Uploaded  03-09-09
 Views  3706
   
 Standing Waves in Air Col...

Chladni

 RunTime  00:08:48
 Uploaded  03-09-09
 Views  3695
   
 Chladni Plates

AM,

 RunTime  00:11:47
 Uploaded  03-09-09
 Views  3687
   
 AM, FM and Balanced Modul...

The

 RunTime  00:10:32
 Uploaded  26-08-09
 Views  3523
   
 The Overtone Series

Speed

 RunTime  00:04:04
 Uploaded  25-08-09
 Views  3511
   
 Speed of Sound

Vocal

 RunTime  00:08:00
 Uploaded  12-11-09
 Views  3492
   
 Vocal Formants

Damped

 RunTime  00:08:41
 Uploaded  24-08-09
 Views  3490
   
 Damped and Driven Oscilla...

 

 

Comments | Queries | Clarifications