Bose Panaray MA12 기술 기반 및 토론 - 페이지 6

{카테고리_이름} Bose Panaray MA12에 대한 기술 기반 및 토론을 온라인으로 검색하거나 PDF를 다운로드하세요. Bose Panaray MA12 36 페이지. Modular line array loudspeaker
Bose Panaray MA12에 대해서도 마찬가지입니다: 사용자 설명서 (2 페이지), 설치 매뉴얼 (16 페이지), 설치 매뉴얼 (8 페이지), 설치 매뉴얼 (7 페이지), 서비스 매뉴얼 (11 페이지)

페이지 인쇄

Figure 1. Sound from spherical waves radiates in all three dimensions:

up and down, left and right, and front and back. As a result, the sound

level decreases by 6 dB whenever the distance is doubled. The reason

for a 6 dB drop (and not something else) is readily understood, and is

contained in a footnote on page 16.

If the 6 dB per doubling of distance behavior is ignored for the moment, and the only

consideration were convenience, the easiest place to put a speaker in a typical room would be

a position in the front of the room with the speaker aimed toward the audience, as shown in

Figure 2a.

This placement, however, has a problem. In the example shown in the figure, the closest

listener is one meter from the speaker, and the farthest listener is twenty meters, a ratio of

twenty to one. This corresponds to a 26 dB difference in sound level, a very large level

difference corresponding to a perception that the sound at the farthest location is perhaps four

or more times softer than the front.

Bose

MA12™ Modular Array: Technical Foundation & Discussion

Spherical-Wave Sources

72dB

78dB

Page 6 of 36

84dB

90dB