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Jing Yang, Jinyu Qian, Xueqing Chen, Volker Kuehnel, Julia Rehmann, Andreas von Buol, Yulin Li, Cuncun Ren, Bo Liu, Li Xu
The present study examined the change in spectral properties of Mandarin vowels and fricatives caused by nonlinear frequency compression (NLFC) used in hearing instruments and how these changes affect the perception of speech sounds in normal-hearing listeners. Speech materials, including a list of Mandarin monosyllables in the form of /dV/ (12 vowels) and /Ca/ (five fricatives), were recorded from 20 normal-hearing, native Mandarin-speaking adults (ten males and ten females). NLFC was based on Phonak SoundRecover algorithms...
March 2018: Journal of the Acoustical Society of America
Angeline Seeto, Grant D Searchfield
BACKGROUND: Advances in digital signal processing have made it possible to provide a wide-band frequency response with smooth, precise spectral shaping. Several manufacturers have introduced hearing aids that are claimed to provide gain for frequencies up to 10-12 kHz. However, there is currently limited evidence and very few independent studies evaluating the performance of the extended bandwidth hearing aids that have recently become available. PURPOSE: This study investigated an extended bandwidth hearing aid using measures of speech intelligibility and sound quality to find out whether there was a significant benefit of extended bandwidth amplification over standard amplification...
March 2018: Journal of the American Academy of Audiology
Grant D Searchfield, Tania Linford, Kei Kobayashi, David Crowhen, Matthias Latzel
OBJECTIVE: To compare preference for and performance of manually selected programmes to an automatic sound classifier, the Phonak AutoSense OS. DESIGN: A single blind repeated measures study. Participants were fit with Phonak Virto V90 ITE aids; preferences for different listening programmes were compared across four different sound scenarios (speech in: quiet, noise, loud noise and a car). Following a 4-week trial preferences were reassessed and the users preferred programme was compared to the automatic classifier for sound quality and hearing in noise (HINT test) using a 12 loudspeaker array...
October 25, 2017: International Journal of Audiology
Jace Wolfe, Mila Duke, Erin C Schafer, Julia Rehmann, Siddhartha Jha, Silvia Allegro Baumann, Andrew John, Christine Jones
OBJECTIVE: The primary goal of this study was to evaluate a new form of non-linear frequency compression (NLFC) in children. The new NLFC processing scheme is adaptive and potentially allows for a better preservation of the spectral characteristics of the input sounds when compared to conventional NLFC processing. DESIGN: A repeated-measures design was utilised to compare the speech perception of the participants with two configurations of the new adaptive NLFC processing to their performance with the existing NLFC...
August 29, 2017: International Journal of Audiology
Erika L Nair, Rhonda Sousa, Shannon Wannagot
BACKGROUND: Guidelines established by the AAA currently recommend behavioral testing when fitting frequency modulated (FM) systems to individuals with cochlear implants (CIs). A protocol for completing electroacoustic measures has not yet been validated for personal FM systems or digital modulation (DM) systems coupled to CI sound processors. In response, some professionals have used or altered the AAA electroacoustic verification steps for fitting FM systems to hearing aids when fitting FM systems to CI sound processors...
July 2017: Journal of the American Academy of Audiology
James A Henry, Garnett McMillan, Serena Dann, Keri Bennett, Susan Griest, Sarah Theodoroff, Shien Pei Silverman, Susan Whichard, Gabrielle Saunders
BACKGROUND: Whereas hearing aids have long been considered effective for providing relief from tinnitus, controlled clinical studies evaluating this premise have been very limited. PURPOSE: The purpose of this study was to systematically determine the relative efficacy of conventional receiver-in-the-canal hearing aids (HA), the same hearing aids with a sound generator (HA+SG), and extended-wear, deep fit hearing aids (EWHA), to provide relief from tinnitus through a randomized controlled trial...
June 2017: Journal of the American Academy of Audiology
Marina Salorio-Corbetto, Thomas Baer, Brian C J Moore
OBJECTIVE: The objective was to assess the degradation of speech sound quality produced by frequency compression for listeners with extensive high-frequency dead regions (DRs). DESIGN: Quality ratings were obtained using values of the starting frequency (Sf) of the frequency compression both below and above the estimated edge frequency, fe , of each DR. Thus, the value of Sf often fell below the lowest value currently used in clinical practice. Several compression ratios were used for each value of Sf...
February 2017: International Journal of Audiology
Lidwien C E Veugen, Maartje M E Hendrikse, Marc M van Wanrooij, Martijn J H Agterberg, Josef Chalupper, Lucas H M Mens, Ad F M Snik, A John van Opstal
Interaural differences in sound arrival time (ITD) and in level (ILD) enable us to localize sounds in the horizontal plane, and can support source segregation and speech understanding in noisy environments. It is uncertain whether these cues are also available to hearing-impaired listeners who are bimodally fitted, i.e. with a cochlear implant (CI) and a contralateral hearing aid (HA). Here, we assessed sound localization behavior of fourteen bimodal listeners, all using the same Phonak HA and an Advanced Bionics CI processor, matched with respect to loudness growth...
June 2016: Hearing Research
Lidwien C E Veugen, Josef Chalupper, Ad F M Snik, A John van Opstal, Lucas H M Mens
OBJECTIVES: The purpose of this study was to improve bimodal benefit in listeners using a cochlear implant (CI) and a hearing aid (HA) in contralateral ears, by matching the time constants and the number of compression channels of the automatic gain control (AGC) of the HA to the CI. Equivalent AGC was hypothesized to support a balanced loudness for dynamically changing signals like speech and improve bimodal benefit for speech understanding in quiet and with noise presented from the side(s) at 90 degree...
May 2016: Ear and Hearing
Jace Wolfe, Mila Morais, Erin Schafer, Smita Agrawal, Dawn Koch
BACKGROUND: Cochlear implant recipients often experience difficulty with understanding speech in the presence of noise. Cochlear implant manufacturers have developed sound processing algorithms designed to improve speech recognition in noise, and research has shown these technologies to be effective. Remote microphone technology utilizing adaptive, digital wireless radio transmission has also been shown to provide significant improvement in speech recognition in noise. There are no studies examining the potential improvement in speech recognition in noise when these two technologies are used simultaneously...
May 2015: Journal of the American Academy of Audiology
Lisa S Davidson, Jill B Firszt, Chris Brenner, Jamie H Cadieux
BACKGROUND: A coordinated fitting of a cochlear implant (CI) and contralateral hearing aid (HA) for bimodal device use should emphasize balanced audibility and loudness across devices. However, guidelines for allocating frequency information to the CI and HA are not well established for the growing population of bimodal recipients. PURPOSE: The study aim was to compare the effects of three different HA frequency responses, when fitting a CI and an HA for bimodal use, on speech recognition and localization in children/young adults...
April 2015: Journal of the American Academy of Audiology
Teresa Y C Ching, Tian Kar Quar, Earl E Johnson, Philip Newall, Mridula Sharma
BACKGROUND: An important goal of providing amplification to children with hearing loss is to ensure that hearing aids are adjusted to match targets of prescriptive procedures as closely as possible. The Desired Sensation Level (DSL) v5 and the National Acoustic Laboratories' prescription for nonlinear hearing aids, version 1 (NAL-NL1) procedures are widely used in fitting hearing aids to children. Little is known about hearing aid fitting outcomes for children with severe or profound hearing loss...
March 2015: Journal of the American Academy of Audiology
Jace Wolfe, Andrew John, Erin Schafer, Mary Hudson, Michael Boretzki, Susan Scollie, Whitney Woods, Julie Wheeler, Krystal Hudgens, Sara Neumann
OBJECTIVE: To evaluate wideband amplification and non-linear frequency compression (NLFC) as a means to improve speech recognition for children with mild/moderate hearing loss. DESIGN: Randomized within-subject design with repeated measures across test conditions. STUDY SAMPLE: Eleven children with mild to moderate hearing loss were evaluated with: (1) Phonak BTE without NLFC, (2) Phonak BTE with NLFC, and (3) Oticon BTE with wideband response extending to 8000 Hz...
March 2015: International Journal of Audiology
Jürgen Kiessling, Melanie Leifholz, Steffen Unkel, Jörn Pons-Kühnemann, Charlotte Thunberg Jespersen, Jenny Nesgaard Pedersen
BACKGROUND: In-situ audiometry is a hearing aid feature that enables the measurement of hearing threshold levels through the hearing instrument using the built-in sound generator and the hearing aid receiver. This feature can be used in hearing aid fittings instead of conventional pure-tone audiometry (PTA), particularly in places where no standard audiometric equipment is available. Differences between conventional and in-situ thresholds are described and discussed for some particular hearing aids...
January 2015: Journal of the American Academy of Audiology
Andrew John, Jace Wolfe, Susan Scollie, Erin Schafer, Mary Hudson, Whitney Woods, Julie Wheeler, Krystal Hudgens, Sara Neumann
BACKGROUND: Previous research has suggested that use of nonlinear frequency compression (NLFC) can improve audibility for high-frequency sounds and speech recognition of children with moderate to profound high-frequency hearing loss. Furthermore, previous studies have generally found no detriment associated with the use of NLFC. However, there have been no published studies examining the effect of NLFC on the performance of children with cookie-bite audiometric configurations. For this configuration of hearing loss, frequency-lowering processing will likely move high-frequency sounds to a lower frequency range at which a greater degree of hearing loss exists...
November 2014: Journal of the American Academy of Audiology
Andreas Buechner, Karl-Heinz Dyballa, Phillipp Hehrmann, Stefan Fredelake, Thomas Lenarz
OBJECTIVE: To investigate the performance of monaural and binaural beamforming technology with an additional noise reduction algorithm, in cochlear implant recipients. METHOD: This experimental study was conducted as a single subject repeated measures design within a large German cochlear implant centre. Twelve experienced users of an Advanced Bionics HiRes90K or CII implant with a Harmony speech processor were enrolled. The cochlear implant processor of each subject was connected to one of two bilaterally placed state-of-the-art hearing aids (Phonak Ambra) providing three alternative directional processing options: an omnidirectional setting, an adaptive monaural beamformer, and a binaural beamformer...
2014: PloS One
Joshua M Alexander, Judy G Kopun, Patricia G Stelmachowicz
OBJECTIVES: The authors have demonstrated that the limited bandwidth associated with conventional hearing aid amplification prevents useful high-frequency speech information from being transmitted. The purpose of this study was to examine the efficacy of two popular frequency-lowering algorithms and one novel algorithm (spectral envelope decimation) in adults with mild to moderate sensorineural hearing loss and in normal-hearing controls. DESIGN: Participants listened monaurally through headphones to recordings of nine fricatives and affricates spoken by three women in a vowel-consonant context...
September 2014: Ear and Hearing
Kathryn Hopkins, Mumtaz Khanom, Ann-Marie Dickinson, Kevin J Munro
OBJECTIVES: To determine whether non-linear frequency compression (NLFC) is effective for hearing-impaired adults in a clinical setting. To determine whether benefit from NLFC is related to duration of NLFC experience or severity of high-frequency hearing loss. DESIGN: Participants were fitted with Phonak frequency compression hearing aids as part of their standard clinical care, using the manufacturer's default fitting settings. Participants had been using NLFC for between 1 and 121 weeks at the time of testing...
April 2014: International Journal of Audiology
Teresa Y C Ching, Julia Day, Vicky Zhang, Harvey Dillon, Patricia Van Buynder, Mark Seeto, Sanna Hou, Vivienne Marnane, Jessica Thomson, Laura Street, Angela Wong, Lauren Burns, Christopher Flynn
OBJECTIVE: To determine the effect of nonlinear frequency compression (NLFC) on children's development of speech and language at three years of age. DESIGN: A randomized controlled trial was conducted as part of the population-based longitudinal study on outcomes of children with hearing impairment (LOCHI). Participants were randomly assigned to fitting with NLFC (Phonak Naida V SP or UP) or with conventional processing in hearing aids, prescribed by using either the NAL or the DSL formula...
December 2013: International Journal of Audiology
Tian Kar Quar, Teresa Y C Ching, Philip Newall, Mridula Sharma
OBJECTIVE: The study aims to compare the performance of hearing aids fitted according to the NAL-NL1 and DSL v5 prescriptive procedure for children. DESIGN: This is a crossover four period trial. STUDY SAMPLE: Sixteen school-aged children with moderately severe to profound hearing losses participated in the study. The children were fitted with Phonak Naida V SP hearing aids according to the two prescriptive procedures. RESULTS: The results showed that children performed significantly better with DSL v5 than with NAL-NL1 prescription for sentence perception in quiet...
May 2013: International Journal of Audiology
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