ACALOS (adaptive categorical loudness scaling) is a psychoacoustic measurement procedure which determines the individual subjective loudness perception. It can be applied in the following areas:
In loudness scaling, test signals are presented at different sound levels. The patient subjectively judges the perceived loudness of a signal using a given categorical scale including the categories “not heard”, “very soft”, “soft”, “medium”, “loud”, “very loud”, and “extremely loud”. The answers given are transformed into a number between 0 (“not heard”) and 50 (“extremely loud”), and they are plotted as a function of test signal sound level. In a diagram showing hearing range as a function of frequency, equal loudness curves can be plotted for the entire frequency range.
The categorical loudness scaling software includes the following:
ACALOS is a standard test, which means that it is recommended to be executed for every patient.
Information about the software version of the test.
Brand T, Hohmann V (2002) An adaptive procedure for categorical loudness scaling. J Acoust Soc Am 112:1597-1604
|HörTech gGmbH, Oldenburg||Hörzentrum Oldenburg GmbH|
|Carl-von-Ossietzky Universität Oldenburg|
Further test procedures in the Auditory Profile.