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Stereo Localization (2)

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The Music Telegraph
Text 2019-01-25

▲ Spot Mic

© The Music Telegraph

 

 

 

Stereo Localization (2)

 

 

 

Spot Mic: 2 feet away from pick-up place

 

 

*Phase cancellation is biggest problem in stereo miking 

 

Phase ‘pulling’ reaction to diaphragm ==> ‘Negative’ voltage

Phase ‘pushing’ reaction to diaphragm ==> ‘positive’ voltage

 

*Poor phase coherence: sound wave reaches each Mic at different phase of cycle

 

 

*Critical distance: the point where the direct sound is equal to the reverberant sound in intensity

 

 

 

To avoid phase cancellation:

(Refer to: http://lossenderosstudio.com/article.php?subject=11)

 

i) X-Y technique

 

ii) Blumlein technique

 

iii) M-S technique

: Mono switch —> Complete cancellation of ribbon Mic L & R (do not touch Mid sound)

: Matrix 

▲ Matrix (M-S tech)

© The Music Telegraph



 

iv) Crossed pair microphone technique (near coincidence)

▲ © Los Senderos Studio



 

 

v) Faulkner technique

▲ Faulkner technique

© Los Senderos Studio



 

 

 

vi) NOS technique

▲ NOS technique

© Wikipedia 



 

 

vii) ORTF technique

▲ ORTF technique

© Wikipedia



 

 

 

viii) OSS (Optimal Stereo Signal): a.k.a. Binaural techniques

▲ Binaural mic technique

© ProSoundWeb



 

 

 

ix) Madsen technique

▲ Madsen microphone technique

© The Music Telegraph




 

x) The Decca tree 

▲ Decca Tree Technique

© AAT Audio Club

 


 

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