Adverse listening conditions affect short-term memory storage and processing of speech for older adults with hearing impairment
(English)Manuscript (preprint) (Other academic)
Purpose: Previous work has shown an effect of noise type on memory for intelligible speech. The aim ofthis study was to investigate the effect of background noise on memory performance of intelligible speech for older adults with hearing impairment using the Auditory Inference Span Test (AIST).
Method: Twenty participants with ages between 67 and 80 years with symmetrical hearing loss (29 to 47dB HL) performed the AIST, which requires processing of five-word sentences at three memoryload levels (MLLs) in three listening conditions: Quiet, steady-state noise (SSN), and backgroundvoices (ISTS). Individualized SNRs targeted 90% speech intelligibility. AIST performance reflects the amount of cognitive capacity occupied in listening, and consequently indicates the amount of listening effort. Working memory capacity (WMC) was assessed using the reading span test, and updating ability (UA) was assessed using the letter memory test.
Results: AIST performance decreased in background noise and with increasing MLL. It was related to UA and age but not to WMC. Response times on questions designed to probe sentence recognition increased with the addition of background noise.
Conclusions: The results demonstrate that the addition of background noise requires more cognitive resourcesto maintain speech recognition performance, leading to higher demands on the cognitive capacity,higher listening effort as measured by poorer memory performance, and longer AIST responsetimes. However, the type of background noise, SSN or ISTS, affected memory performance similarly.
Speech-in-noise, Cognition, Working memory, Updating, Hearing impairment, Listening effort, Cognitive spare capacity
Clinical Medicine Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-109680OAI: oai:DiVA.org:liu-109680DiVA: diva2:740381