New ‘
SpeakerMeasure‘ is a free software tool from
Eclipse Audio that automates the
AES75 test procedure used to determine maximum SPL. It speeds up the measurement process and – more importantly – results in measurements that are both repeatable and objective.
The
Audio Engineering Society standard, released in 2022, details a test procedure for measuring maximum linear sound levels of a loudspeaker system or driver using a test signal called ‘Music Noise’ (originally M-Noise). The AES75 procedure covers two basic steps: a ‘Linear Response Check and a ‘Level Increase Test.’
In the latter, the playback level of the Music Noise stimulus is increased until specific stop conditions occur; either an unacceptable change in the transfer...
