Evidence map›Paper›PMID 26936574›Full record

ArticleThe Journal of the Acoustical Society of America2016

Nonlinear frequency compression: Influence of start frequency and input bandwidth on consonant and vowel recognition.

Joshua M Alexander

Abstract read
In one paragraph

Article in The Journal of the Acoustical Society of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing 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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

13 citing papers in PubMed.

  1. Listener Performance with a Novel Hearing Aid Frequency Lowering Technique.Journal of the American Academy of Audiology · 2017
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author.

Joshua M AlexanderDepartment of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana 47907, USA.

Funding

Contrast Enhancement to Improve Speech Recognition with Hearing DevicesRC1DC010601 · NIDCD · UNIVERSITY OF WISCONSIN-MADISON · PI KLUENDER, KEITH R · 2009 to 2010
$996k
NIDCD NIH HHS RC1 DC010601
6 · The paper itself

Abstract

By varying parameters that control nonlinear frequency compression (NFC), this study examined how different ways of compressing inaudible mid- and/or high-frequency information at lower frequencies influences perception of consonants and vowels. Twenty-eight listeners with mild to moderately severe hearing loss identified consonants and vowels from nonsense syllables in noise following amplification via a hearing aid simulator. Low-pass filtering and the selection of NFC parameters fixed the output bandwidth at a frequency representing a moderately severe (3.3 kHz, group MS) or a mild-to-moderate (5.0 kHz, group MM) high-frequency loss. For each group (n = 14), effects of six combinations of NFC start frequency (SF) and input bandwidth [by varying the compression ratio (CR)] were examined. For both groups, the 1.6 kHz SF significantly reduced vowel and consonant recognition, especially as CR increased; whereas, recognition was generally unaffected if SF increased at the expense of a higher CR. Vowel recognition detriments for group MS were moderately correlated with the size of the second formant frequency shift following NFC. For both groups, significant improvement (33%-50%) with NFC was confined to final /s/ and /z/ and to some VCV tokens, perhaps because of listeners' limited exposure to each setting. No set of parameters simultaneously maximized recognition across all tokens.

Indexed as

Pitch PerceptionRecognition, PsychologySpeech AcousticsSpeech IntelligibilitySpeech PerceptionVoice QualityAcousticsAcoustic StimulationAdultAgedAged, 80 and overAudiometry, SpeechAuditory ThresholdCuesFemaleHearing Loss

Identifiers

PMID26936574
PMCPMC4769266

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.