Live speech mapping is REM using speech as the stimulus source.
LSM is an evolution of the original tone/noise based verification methods to accurately evaluate the advancing complexity of hearing aids. If you play a test tone to a modern aid, the feedback manager will choose not to amplify it. If you play it white noise, the speech detection system will not recognise it and amplify it. If you play it garbled speech, your sample has to be long enough to be meaningful.
OR you can use LSM and put the output in a range of performance that ‘hits’ the patient prescription given their residual dynamic range.
Still doesn’t mean that the test is representative of where the patient ‘likes’ the sound though.