Acoustic reviews

Setup of a plane wave generator with the loudspeaker on the left and the microphone network system under test on the right As we work more and more with multi-microphone networks in our laboratories, such as beamformers, we often want to control acoustic behavior of all the microphones at the same time. One method to accomplish this is a loudspeaker system relatively far from the microphone network so that all wavefronts in the bandwidth of interest are seen as planar by the network. (Figure 2 against Figure 1). In this configuration, all the microphones would receive incoming waves with

Speaker enclosure directivity qualification inside the LNE Anechoic chamber When listening to music with a speaker system, we want perfect sound reproduction regardless of where we are in a room. However, depending on the type of speaker and the geometry of the speaker enclosure, there can be a large range of considerations to optimize the design.This is one of the reasons why it is fundamental to properly quantify the behavior of a speaker system in an appropriate acoustic environment.This analysis can be achieved by performing sound pressure level measurements at different angles around the system.The step angle between each measurement will determine the accuracy :