What is a Speech-in-Noise (SiN) test?
Speech-in-Noise (SiN) testing is considered a more accurate assessment of overall hearing ability in comparison to pure tone audiometry which only assesses hearing acuity. By SiN testing provides an additional tool to assess the status of a patient's auditory system.
SiN tests are used in many applications including hearing aid fitting, clinical diagnosis and measurement of functional capacity of the hearing system, providing clinicians and hearing care professionals with highly valuable information about the actual SiN understanding of the test subject.
What are the different types of Speech-in-Noise (SiN) test?
Many different tests and tools exist to analyse and assess SiN ability, such as Hearing-in-Noise Test (HINT), Quick-Speech-in-Noise (QuickSiN), Words-in-Noise (WiN), the Triple Digit Test (TDT) and the Coordinate Response Measure (CRM).
The CRM test has been chosen to assess AFFD for the Police and other command-and-control type organisations because of its clear similarities to real world environments (high face validity), clear focus on auditory skills and ability to differentiate clearly between hearing abilities.
How does a FHAS speech-in-noise test work?
The FHAS test looks to establish the quietest level at which a subject can repeatedly hear and understand a command against a background noise. The test consists for two parts which assess different auditory performance but work in the same way of directing a command in background noise through a headphone in either ear.
Both ears are tested separately but in an innovative interleaved procedure. The subject is required to enter their selection of variables through visual display unit (VDU), e.g. a touchscreen tablet.