Evidence map›Paper›PMID 29325392›Full record

ArticleJournal of audiology & otology2017

Horizontal Localization in Simulated Unilateral Hearing Loss.

Anvarsamarein Parisa, Nazeri Ahmad Reza, Sameni Seyyed Jalal, Kamali Mohammad, Zarrin Koob Homa

Erratum issuedAbstract read
In one paragraph

Article in Journal of audiology & otology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Anvarsamarein ParisaDepartment of Audiology, School of Rehabilitation Sciences, Shahid Beheshti Medical University, Tehran, Iran.
Nazeri Ahmad RezaDepartment of Audiology, School of Rehabilitation Sciences, Shahid Beheshti Medical University, Tehran, Iran.
Sameni Seyyed JalalDepartment of Audiology,School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Kamali MohammadDepartment of Basic Sciences in Rehabilitation, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Zarrin Koob HomaDepartment of Audiology, School of Rehabilitation Sciences, Shahid Beheshti Medical University, Tehran, Iran.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectivesThe ability to localize a sound source is one of the binaural hearing benefits in a horizontal plane based on interaural time difference and interaural intensity difference. Unilateral or bilateral asymmetric hearing loss will affect binaural hearing and lead to sound locating errors. In this cross sectional analytical descriptive study, the localization error was investigated when participants turned their heads to the sound source with closed eyes and after simulating unilateral hearing loss by placing earplugs inside the right ear canal. SUBJECTS AND

methodsThis cross sectional analytical descriptive study was carried out on 30 right-handed adults, 22 female and 8 male (average: 25 years, standard deviation: 3.16). They were selected with the available random access method. Horizontal localization was evaluated with five speakers located at 0, ±30, and ±60 degree azimuths at a 1-meter distance from the examinee. Narrow-band noise signals were delivered at 35 dB SL in two "without earplug" and "with earplug" situations and the results were compared. The study was performed between September and December 2016 in Tehran, Iran.

resultsSignificant differences were observed in localization errors between the "with earplug" and "without earplug" situations. The localization differences were greater for left-side speakers (-30 and -60 degrees) compared with right-side speakers (+30 and +60 degrees). The differences were more apparent at 4,000 and 6,000 Hz, which confirmed the effect of unilateral simulated hearing loss on interaural latency differences.

conclusionsSimulating hearing loss by using an earplug in one ear (right) increased localization errors at all frequencies. The errors increased at higher frequencies.

Indexed as

EarplugHearingUnilateral hearing loss

Identifiers

PMID29325392
PMCPMC5784370

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