Bose Panaray MA12 Base technique et discussion - Page 15

Parcourez en ligne ou téléchargez le pdf Base technique et discussion pour {nom_de_la_catégorie} Bose Panaray MA12. Bose Panaray MA12 36 pages. Modular line array loudspeaker
Également pour Bose Panaray MA12 : Manuel de l'utilisateur (2 pages), Manuel d'installation (16 pages), Manuel d'installation (8 pages), Manuel d'installation (7 pages), Manuel d'entretien (11 pages)

Bose Panaray MA12 Base technique et discussion
Figure 6. What makes plane waves impractical is the fact that there is
no sound outside the physical size of the source.
Cylindrical waves
A
this point, two kinds of waves have been described: spherical waves that radiate in three
T
dimensions and whose intensity drops off by 6 dB per doubling of distance, and plane waves
that radiate in one dimension and fall off by 0 dB per doubling of distance. A natural question
is, therefore: "Is there a third kind of wave that radiates in two dimensions and falls of
somewhere between 0 and 6 dB per doubling of distance?" The answer is yes. And these are
called cylindrical waves. To understand their behavior, it is helpful to return to the one-meter
by one-meter source that created plane waves. Looking down on the plane-wave source, it is
clear that the sound is confined to the width of the source (Figure 7, top right). Looking from
the side of the source, the sound is similarly confined to the height of the source (Figure 7,
bottom right).
®
Bose
MA12™ Modular Array: Technical Foundation & Discussion
April 2002, © Bose Corporation, All Rights Reserved
Page 15 of 36