Effect of Linear Frequency Transposition on Speech Recognition and Production of School-Age Children

Abstract

These results suggest that LFT is a potentially useful hearing aid feature for school-age children with a precipitous HF sensorineural hearing loss.

Effectiveness of Frequency-Lowering Hearing Aids and Electric Acoustic Stimulation Cochlear Implant for Treating People with a Severe-To-Profound High-Frequency Hearing Loss

“…Also, selected measurement tools may not have been sensitive enough to the subtle effects of NFC or LFT HAs, or not representative enough of real life. Other researchers used more analytical tasks, such as consonant recognition or /s/ detection [34][35][36][37]. We chose to use ecological outcome measures closer to real-life experience that are also considered clinical standard tests.…”

The effect of using integrated signal processing hearing aids on the speech recognition abilities of hearing impaired Arabic-speaking children

“…34 A great number of clinical studies have been conducted to quantify the effectiveness of advanced HA features as adaptive directionality, noise reduction and speech enhancement algorisms dynamic feedback cancelation and frequency transposition in improving speech intelligibility. 29,43,17,6,3,4 ISP is a relatively new technology incorporated in HAs which uses a coordinated and concerted approach so that both wearer and environmental information, along with the intermediate results of each processing unit, are shared among other signal processing units in order to achieve the best sound quality and intelligibility. 30 In ISP the various processing features are grouped into 3 functional modules: the high definition sound analysis (HDSA) module which characterizes and classifies the nature of the acoustic environment, the high definition sound processing module which includes all processing functions as compression, noise reduction feedback cancelation and finally the high definition system optimizer module which ensures optimal and efficient operation for all components.…”

The Effect of Frequency Transposition on Speech Perception in Adolescents and Young Adults with Profound Hearing Loss

“…Studies have shown that when a hearing loss begins to exceed 55 dB in the high frequencies, participants may not benefit from highfrequency amplification (Moore, 2001). This lack of benefit of high-frequency amplification has been attributed to limitations of the hearing aid in the form of restricted bandwidth, low maximum output, or feedback before the necessary level of amplification is reached (Stelmachowicz et al, 2001;Auriemmo et al, 2009) as well as the existence of dead regions, that is, areas of the cochlea with no functioning inner hair cells (Moore, 2001;Baer et al, 2002;Preminger et al, 2005). Studies on speech perception in people with suspected high-frequency dead regions have shown that amplification of the high frequencies often fails to provide benefit and may in fact lead to poorer performance in some instances (Ching et al, 1998;Hogan & Turner, 1998;Turner & Cummings, 1999).…”

“…In practice, the linear frequency transposition technique has been found to produce successful outcomes for children with precipitously sloping high-frequency hearing loss (Auriemmo et al, 2008(Auriemmo et al, , 2009Booysen et al, 2008;Verschoor et al, 2008;Smith et al, 2009). For example, Auriemmo et al (2009) reported significant improvements in the consonant and vowel recognition and fricative articulation of 10 school-aged children with precipitously sloping hearing losses after 6 weeks of use of the Audibility Extender.…”

“…For example, Auriemmo et al (2009) reported significant improvements in the consonant and vowel recognition and fricative articulation of 10 school-aged children with precipitously sloping hearing losses after 6 weeks of use of the Audibility Extender. Smith et al (2009) reported an overall significant improvement in the speech perception and production of a group of six school-aged children after 24 weeks of use of the Audibility Extender, although individual benefits varied.…”