During a categorical loudness scaling test signals are presented at different levels. The subject responds the subjectively perceived loudness in terms of a categorical scale. The scale includes the verbal categories “not heard”,“very soft”,“soft”,“medium” ,“loud” ,“very loud” and “extremely loud”. This verbal scale is mapped to the numeric range of 0 (“not heard”) to 50 (“extremely loud”) and graphically shown as a function of signal level. The so-called “sensation field” representation shows “iso-loudness-contours” as a function of frequency in an audiogram-like chart.
- Diagnosis of hearing loss
- Assessment of recruitment phenomenon for sensorineural hearing loss
- Assessment of fitting paramaters for hearing systems with dynamic compression
- Verification of hearing system fitting
Narrowband noises with different center frequencies may be used as test signals as well as broadband noises, for instance speech shaped noises.
Oldenburg Measurement Applications
- third-octave noises up to 10 kHz for narrowband loudness scaling
- Iso-loudness-contours showing the dynamic range of hearing as “sensation field”
- Speech shaped noises for broadband loudness scaling
- Automatic adaptive loudness scaling according to ISO 16832
- Premature manual finish of each signal possible
- Different model functions possible for fitting of loudness functions
- Manual (non-adaptive) loudness scaling possible
- Response given directly by the patient possible
520,- € (recommended retail price) plus German statutory value-added-tax for an already existing basic licence.
A basic licence is available for 650.00 € (recommended retail price) plus German statutory value-added-tax (amendments may occur).
Installation and service will be charged by your audiometer provider at cost.
* This document is NOT an electronic instruction manual according to regulation (EC) No. 207/2012, but merely to be used as information material. Only the instruction manual, which is enclosed to the product, has to be used!