Generally, loudspeakers are measured in an anechoic chamber. However, those chambers are very expensive, which make sound engineer`s easy acoustical measurements almost impossible. Thus the authors devised a new measurement without using any anechoic chamber. Traditionally, loudspeakers are measured in an anechoic chamber by installing in a proper speaker enclosure and by driving with swept sinusoidal signal. Loudspeaker`s radiated sound is detected with an omni-directional reference microphone, and the output of the microphone is displayed graphically. If a shot-gun microphone is employed in stead of omni directional microphone, anechoic chamber will become un-necessary. Furthermore, if pulse-train is used as a test signal, noise in surrounding circumstance will be reduced by applying synchronous-averaging algorithm. Based upon this idea the authors measured loudspeaker in any acoustical circumstances, and obtained very similar data with that by the traditional method.
(See document for exact affiliation information.)
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member Join the AES. If you need to check your member status, login to the Member Portal.
