Wyrazistość logatomów prezentowanych na tle szumu mowopodobnego dla osób z niedosłchem typu 'martwe pola' w zakresie wysokich czestotliwości

Translated title of the contribution: Effects of lowpass filtering on the intelligibility of speech in noise for listeners with dead regions at high frequencies

Karolina Kluk, Brian C.J. Moore

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper is concerned with effects of lowpass filtering on the intelligibility of speech in noise for listeners with dead regions at high frequencies. The speech stimuli were vowel-consonant-vowel (VCV) nonsense syllables, using one of three vowels (/i/, /a/ and /u/) and 21 different consonants. They were presented in speech shaped noise. The stimuli were subjected to the frequency-gain characteristic prescribed by the "Cambridge" formula. Then, the speech was lowpass filtered with various cutoff frequencies. For subjects without a dead region, performance improved progressively with increasing cutoff frequency. This indicates that they benefited from high-frequency information. For subjects with a dead region, two patterns of performance were observed. For most subjects, performance improved with increasing cutoff frequency until the cutoff frequency was up to 70% above the estimated edge frequency of the dead region, but hardly changed with further increases. Thus, these subjects were not able to benefit from the addition of high-frequency information, but the amplification of these frequencies did not impair performance for them. For other subjects, performance improved with increasing cutoff frequency until the cutoff frequency was about an octave above the estimated edge frequency of the dead region, but worsened with further increases in cutoff frequency. This indicates that amplification of high frequencies impaired performance.

Translated title of the contributionEffects of lowpass filtering on the intelligibility of speech in noise for listeners with dead regions at high frequencies
Original languagePolish
Pages (from-to)87-92
Number of pages6
JournalPrace Naukowe Instytutu Telekomunikacji i Akustyki Politechniki Wroclawskiej
Issue number83
Publication statusPublished - 1 Dec 2001
Event48th Open Seminar on Acoustics OSA 2001 - Wroclaw, Poland
Duration: 11 Sep 200114 Sep 2001

Keywords

  • Hearing aids
  • Noise
  • Frequency compression

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