In this study, a set of 30 sequences of 2 tones differing in their pitch (880 Hz and 1122 Hz), arranged in 3-tone tokens, was presented monaurally to each ear (at 50 dB HL above the subject's threshold at 1000 Hz in the PTA).
Stimuli were presented monaurally at 50 dB HL above the subject's threshold at 1000 Hz in the PTA.
Earlier studies demonstrated that subjects with normal hearing and hearing loss discriminate a speech signal better binaurally than monaurally
in the presence of noise.
Testing procedure: Medically screened subjects underwent otoscopy and pure tone audiogram, followed by speech identification of five sentences presented monaurally to each ear at 35 dB HL above APTT (to confirm that patients could perceive and repeat the message when presented monaurally and to familiarize patients with the sentences).
Stroke Controls subjects Childhood hearing loss 1 1 English not first language 1 -- APTT more than 50 dB HL 2 4 Could not repeat test sentences when presented monaurally 3 3 Unable to complete test -- 2 Table II.
In 14.3% of the articles, the assessment was performed monaurally
on both ears [5, 35].
Patients who wear an aid monaurally
may have different rehabilitation needs than those who wear an aid binaurally and, therefore, may receive different benefits from group visits.
The auditory filter and critical band are usually measured monaurally
and therefore refer to monaural frequency selectivity.
The resulting "soundscape", is a complex signal comprised of a large number of frequencies and amplitudes, played back to the user either monaurally
or binaurally via headphones.
Unfortunately, these prior studies were conducted either under earphones, monaurally
, with a small sample size, or without the use of a control group.