D-0133833-A – 2022/09
AD629 - Instructions for Use - EN
Page 17
Weber
The Weber test distinguished between conductive and sensorineural hearing loss through use of a bone
conductor. Use the indications to show where the tone is perceived. If the patient hears the tone better in
the poorer ear the hearing loss is conductive, and the tone is heard better in the better ear the hearing
loss is sensorineural at the given frequency.
The symbols for Weber correspond with the soft buttons:
Percieved right
Percieved center
Percieved left
Not heard
No reaction
Speech test
Speech testing can be done via pre-recorded wave files (23) (if installed), microphone (43) or CD input
(25).
Most people acquire hearing aids because they themselves or their relatives report that they have trouble
hearing speech. Speech audiometry has the advantage of other speech signals and is used to quantify
the patient’s ability to understand everyday communication. It examines the patient’s processing ability in
relation to their degree and type of hearing loss which can vary greatly between patients with the same
hearing loss configuration.
Speech audiometry can be performed using a number of tests. For example, SRT (Speech Reception
Threshold) refers to the level at which the patient can repeat 50% of the presented words correctly. It
serves as a check of the pure tone audiogram, gives an index of hearing sensitivity for speech, and helps
determine the starting point for other supra-threshold measures such as WR (Word Recognition). WR is
sometimes also referred to as SDS (Speech Discrimination Scores) and represents the number of words
correctly repeated expressed as a percentage.
