ABSTRACT
This chapter discusses the room influences on a loudspeaker response. It explains the radiation pattern differences and their effect on a room response. The chapter examines the electronic bass-traps. In an anechoic chamber or in a true free-field situation, excellent loudspeakers may produce a frequency response which is flat within ±2 dB over their designed performance range. The term infinite baffle is often wrongly used to describe a sealed box loudspeaker. An aspect of dipole radiation is that because in almost all practical cases the loudspeakers present their side-nulls towards the other loudspeaker in a pair, virtually no radiation from one loudspeaker can impinge directly upon the diaphragm of the other. True reverberation exists as a diffuse sound field, with equal energy being present at any one time in any equal volume anywhere in the room. A non-minimum phase response modification would be produced by the multiple reflexions from room boundaries superimposing themselves upon the direct sound from a loudspeaker.
