nach oben

Journal of the Association for Research in Otolaryngology

Erschienen in:

01.08.2014 | Research Article

Modulation Enhancement in the Electrical Signal Improves Perception of Interaural Time Differences with Bimodal Stimulation

verfasst von: Tom Francart, Anneke Lenssen, Jan Wouters

Erschienen in: Journal of the Association for Research in Otolaryngology | Ausgabe 4/2014

Einloggen, um Zugang zu erhalten

Abstract

Interaural timing cues are important for sound source localization and for binaural unmasking of speech that is spatially separated from interfering sounds. Users of a cochlear implant (CI) with residual hearing in the non-implanted ear (bimodal listeners) can only make very limited use of interaural timing cues with their clinical devices. Previous studies showed that bimodal listeners can be sensitive to interaural time differences (ITDs) for simple single- and three-channel stimuli. The modulation enhancement strategy (MEnS) was developed to improve the ITD perception of bimodal listeners. It enhances temporal modulations on all stimulated electrodes, synchronously with modulations in the acoustic signal presented to the non-implanted ear, based on measurement of the amplitude peaks occurring at the rate of the fundamental frequency in voiced phonemes. In the first experiment, ITD detection thresholds were measured using the method of constant stimuli for five bimodal listeners for an artificial vowel, processed with either the advanced combination encoder (ACE) strategy or with MEnS. With MEnS, detection thresholds were significantly lower, and for four subjects well within the physically relevant range. In the second experiment, the extent of lateralization was measured in three subjects with both strategies, and ITD sensitivity was determined using an adaptive procedure. All subjects could lateralize sounds based on ITD and sensitivity was significantly better with MEnS than with ACE. The current results indicate that ITD cues can be provided to bimodal listeners with modified sound processing.

http://bootstrap-software.org/psignifit/

Akeroyd M (2003) Threshold differences for interaural time delays carried by double vowels. J Acoust Soc Am 114(4 Pt 1):2167–2177PubMedCrossRef

Akeroyd M (2006) The psychoacoustics of binaural hearing. Int J Audiol 45(Suppl 1):25–33CrossRef

Bernstein L, Trahiotis C (2002) Enhancing sensitivity to interaural delays at high frequencies by using “transposed stimuli”. J Acoust Soc Am 112(3 Pt 1):1026–1036PubMedCrossRef

Bernstein L, Trahiotis C (2009) How sensitivity to ongoing interaural temporal disparities is affected by manipulations of temporal features of the envelopes of high-frequency stimuli. J Acoust Soc Am 125(5):3234–3242PubMedCentralPubMedCrossRef

Bernstein L, Trahiotis C (2010) Accounting quantitatively for sensitivity to envelope-based interaural temporal disparities at high frequencies. J Acoust Soc Am 128(3):1224–1234PubMedCentralPubMedCrossRef

Boersma P, Weenink D (2001) Praat, a system for doing phonetics by computer. Glot Int 5(9/10):341–345

Bronkhorst A (2000) The cocktail party phenomenon: a review of research on speech intelligibility in multiple-talker conditions. Act Acust 86(6):117–128

Buell T, Griffin S, Bernstein L (2008) Listeners’ sensitivity to “onset/offset” and “ongoing” interaural delays in high-frequency, sinusoidally amplitude-modulated tones. J Acoust Soc Am 123:279PubMedCrossRef

Ching T, van Wanrooy E, Dillon H (2007) Binaural-bimodal fitting or bilateral implantation for managing severe to profound deafness: a review. Trends Amplif 11(3):161–192PubMedCrossRef

Colburn H, Shinn-Cunningham B, Kidd G, Durlach N (2006) The perceptual consequences of binaural hearing. Int J Audiol 45(Suppl 1):34–44CrossRef

Domnitz R (1973) The interaural time JND as a simultaneous function of interaural time and interaural amplitude. J Acoust Soc Am 53(6):1549–1552PubMedCrossRef

Ewert S, Dietz M, Klein-Hennig M, Hohmann V (2009) Advances in auditory physiology, psychophysics and models; the role of envelope wave form, adaptation, and attacks in binaural perception. Springer, New York

Francart T, McDermott H (2012a) Development of a loudness normalisation strategy for combined cochlear implant and acoustic stimulation. Hear Res 294(1–2):114–124PubMedCrossRef

Francart T, McDermott H (2012b) Speech perception and localisation with SCORE bimodal: a loudness normalisation strategy for combined cochlear implant and hearing aid stimulation. Plos One 7(10)

Francart T, van Wieringen A, Wouters J (2008) APEX 3: a multi-purpose test platform for auditory psychophysical experiments. J Neurosci Methods 172(2):283–293PubMedCrossRef

Francart T, Brokx J, Wouters J (2009) Sensitivity to interaural time differences with combined cochlear implant and acoustic stimulation. J Assoc Res Otolaryngol 10(1):131–141PubMedCentralPubMedCrossRef

Francart T, Lenssen A, Wouters J (2011) Sensitivity of bimodal listeners to interaural time differences with modulated single- and multiple-channel stimuli. Audiol Neurootol 16(2):82–92PubMedCrossRef

Francart T, Lenssen A, Wouters J (2012) The effect of interaural differences in envelope shape on the perceived location of sounds. J Acoust Soc Am 132(2):611–614PubMedCrossRef

Freyman RL, Zurek PM, Balakrishnan U, Chiang YC (1997) Onset dominance in lateralization. J Acoust Soc Am 101(3):1649–1659PubMedCrossRef

Grantham D, Ashmead D, Ricketts T, Haynes D, Labadie R (2008) Interaural time and level difference thresholds for acoustically presented signals in post-lingually deafened adults fitted with bilateral cochlear implants using cis processing. Ear Hear 29(1):33–44PubMed

Green T, Faulkner A, Rosen S (2004) Enhancing temporal cues to voice pitch in continuous interleaved sampling cochlear implants. J Acoust Soc Am 116(4 Pt 1):2298–2310PubMedCrossRef

Henning G (1974) Detectability of interaural delay in high-frequency complex waveforms. J Acoust Soc Am 55(1):84–90PubMedCrossRef

ISO 389-2 (1994) ISO 389-2 reference zero for the calibration of audiometric equipment—part 2: reference equivalent threshold sound pressure levels for pure tones and insert earphones

Klatt D (1980) Software for a cascade/parallel formant synthesizer. J Acoust Soc Am 67(3):971–995CrossRef

Kunov H, Abel S (1981) Effects of rise/decay time on the lateralization of interaurally delayed 1-khz tones. J Acoust Soc Am 69(3):769–773PubMedCrossRef

Laback B, Pok S, Baumgartner W, Deutsch W, Schmid K (2004) Sensitivity to interaural level and envelope time differences of two bilateral cochlear implant listeners using clinical sound processors. Ear Hear 25(5):488–500PubMedCrossRef

Laback B, Majdak P, Baumgartner W (2007) Lateralization discrimination of interaural time delays in four-pulse sequences in electric and acoustic hearing. J Acoust Soc Am 121(4):2182–2191PubMedCrossRef

Laback B, Zimmerman I, Majdak P, Baumgartner W, Pok S (2011) Effects of envelope shape on interaural envelope delay sensitivity in acoustic and electric hearing. J Acoust Soc Am 130(3):1515–1529PubMedCrossRef

Laneau J, Wouters J, Moonen M (2006) Improved music perception with explicit pitch coding in cochlear implants. Audiol Neurotol 11(1):38–52CrossRef

Lawson D, Wilson B, Zerbi M, van den Honert C, Finley C, Farmer J Jr, McElveen J Jr, Roush P (1998) Bilateral cochlear implants controlled by a single speech processor. Am J Otol 19(6):758–761PubMed

Lenssen A, Francart T, Brokx J, Wouters J (2011) Bimodal listeners are not sensitive to interaural time differences in unmodulated low-frequency stimuli. J Acoust Soc Am 129(6):3457–3460PubMedCrossRef

Litovsky R, Jones G, Agrawal S, van Hoesel R (2010) Effect of age at onset of deafness on binaural sensitivity in electric hearing in humans. J Acoust Soc Am 127(1):400–414PubMedCentralPubMedCrossRef

Litovsky R, Goupell M, Godar S, Grieco-Calub T, Garadat S, Agrawal S, van Hoesel R (2012) Studies on bilateral cochlear implants at the University of Wisconsin’s Binaural Hearing and Speech Laboratory. J Am Acad Audiol 23(1):476–494PubMedCentralPubMed

Long C, Eddington D, Colburn H, Rabinowitz W (2003) Binaural sensitivity as a function of interaural electrode position with a bilateral cochlear implant user. J Acoust Soc Am 114(3):1565–1574PubMedCrossRef

Majdak P, Laback B, Baumgartner W (2006) Effects of interaural time differences in fine structure and envelope on lateral discrimination in electric hearing. J Acoust Soc Am 120(4):2190–2201PubMedCrossRef

McDermott H, McKay C, Vandali A (1992) A new portable sound processor for the University of Melbourne/nucleus limited multielectrode cochlear implant. J Acoust Soc Am 91(6):3367–3371PubMedCrossRef

Milczynski M, Wouters J, van Wieringen A (2009) Improved fundamental frequency coding in cochlear implant signal processing. J Acoust Soc Am 125(4):2260–2271PubMedCrossRef

Milczynski M, Chang JE, Wouters J, van Wieringen A (2012) Perception of Mandarin Chinese with cochlear implants using enhanced temporal pitch cues. Hear Res 285(1–2):1–12PubMedCrossRef

Sayers B (1964) Acoustic-image lateralization judgments with binaural tones. J Acoust Soc Am 36(5):923–926CrossRef

Senn P, Kompis M, Vischer M, Haeusler R (2005) Minimum audible angle, just noticeable interaural differences and speech intelligibility with bilateral cochlear implants using clinical speech processors. Audiol Neurootol 10(6):342–352PubMedCrossRef

Swanson B (2008) Pitch perception with cochlear implants. Ph.D. thesis, The University of Melbourne

van Hoesel R (2004) Exploring the benefits of bilateral cochlear implants. Audiol Neurootol 9(4):234–246PubMedCrossRef

van Hoesel R (2007) Sensitivity to binaural timing in bilateral cochlear implant users. J Acoust Soc Am 121(4):2192–2206PubMedCrossRef

van Hoesel R, Tyler R (2003) Speech perception, localization, and lateralization with bilateral cochlear implants. J Acoust Soc Am 113(3):1617–1630PubMedCrossRef

Vandali AE, van Hoesel RJ (2011) Development of a temporal fundamental frequency coding strategy for cochlear implants. J Acoust Soc Am 129(6):4023–4036PubMedCrossRef

Vandali A, Whitford L, Plant K, Clark G (2000) Speech perception as a function of electrical stimulation rate: using the Nucleus 24 cochlear implant system. Ear Hear 21(6):608–624PubMedCrossRef

Vandali A, Sucher C, Tsang D, McKay C, Chew J, McDermott H (2005) Pitch ranking ability of cochlear implant recipients: a comparison of sound-processing strategies. J Acoust Soc Am 117(5):3126–3138PubMedCrossRef

Wichmann F, Hill N (2001) The psychometric function: II. Bootstrap-based confidence intervals and sampling. Percept Psychophys 63(8):1314–1329PubMedCrossRef

Titel: Modulation Enhancement in the Electrical Signal Improves Perception of Interaural Time Differences with Bimodal Stimulation
verfasst von: Tom Francart
Anneke Lenssen
Jan Wouters
Publikationsdatum: 01.08.2014
Verlag: Springer US
Erschienen in: Journal of the Association for Research in Otolaryngology / Ausgabe 4/2014
Print ISSN: 1525-3961
Elektronische ISSN: 1438-7573
DOI: https://doi.org/10.1007/s10162-014-0457-9

Neu im Fachgebiet HNO

16.04.2024 | HNO-Chirurgie | Nachrichten

Update HNO

Bestellen Sie unseren Fach-Newsletter und bleiben Sie gut informiert – ganz bequem per eMail.

Newsletter bestellen

Springer Medizin

Modulation Enhancement in the Electrical Signal Improves Perception of Interaural Time Differences with Bimodal Stimulation

Abstract

Neu im Fachgebiet HNO

HNO-Op. auch mit über 90?

Intrakapsuläre Tonsillektomie gewinnt an Boden

Bilateraler Hörsturz hat eine schlechte Prognose

„Nur wer sich gut aufgehoben fühlt, kann auch für Patientensicherheit sorgen“

Update HNO

Springer Medizin

Abstract

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

Weitere Artikel der Ausgabe 4/2014

Erratum to: I h and HCN Channels in Murine Spiral Ganglion Neurons: Tonotopic Variation, Local Heterogeneity, and Kinetic Model

Experimental Measurement of Utricle System Dynamic Response to Inertial Stimulus

Changes in Cochlear PMCA2 Expression Correlate with the Maturation of Auditory Sensitivity

Olivocochlear Innervation Maintains the Normal Modiolar-Pillar and Habenular-Cuticular Gradients in Cochlear Synaptic Morphology

Hearing Loss is an Early Consequence of Npc1 Gene Deletion in the Mouse Model of Niemann–Pick Disease, Type C

The Auditory Enhancement Effect is Not Reflected in the 80-Hz Auditory Steady-State Response

Neu im Fachgebiet HNO

HNO-Op. auch mit über 90?

Intrakapsuläre Tonsillektomie gewinnt an Boden

Bilateraler Hörsturz hat eine schlechte Prognose

„Nur wer sich gut aufgehoben fühlt, kann auch für Patientensicherheit sorgen“

Update HNO