The National Acoustic Laboratoriesʼ Procedure for Selecting the Saturation Sound Pressure Level of Hearing Aids: Experimental Validation

Storey, L. R. O.; Dillon, Harvey; Yeend, Ingrid; Wigney, David

doi:10.1097/00003446-199808000-00002

Cited by 23 publications

(20 citation statements)

References 7 publications

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“…The relationship between the recommended output-limiting levels and hearing threshold from the DSL Method v3.1 is also shown in Figure 1. These prescribed real-ear output-limiting criteria are approximately one standard deviation below the mean LDL data reported by Pascoe (1978) and agree closely with the maximum output target values recommended by other hearing instrument prescriptive procedures (e.g., Dillon and Storey, 1998;Storey et al, 1998).…”

Section: The Linear Gain Erasupporting

confidence: 84%

The DSL Method for Pediatric Hearing Instrument Fitting: Historical Perspective and Current Issues

Seewald

Moodie

Scollie

et al. 2005

Trends in Amplification

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The Desired Sensation Level (DSL) Method was originally developed in the early 1980s to provide clinicians with a systematic, science-based approach to pediatric hearing instrument fitting that ensures audibility of amplified speech by accounting for factors that are uniquely associated with the provision of amplification to infants and young children who have hearing loss. This review identifies and describes several of the primary factors that have been considered in the development of the DSL Method. Specifically, the issues discussed relate to: (1) the definition and measurement of relevant acoustic, electroacoustic and audiometric variables; (2) how the external ear acoustics of infants and young children are accounted for in the DSL Method for both audiometric assessment and in the fitting of amplification; and (3) how the DSL Method has evolved concurrently with developments in hearing instrument and electroacoustic measurement technologies. Finally, current issues in the field are identified that have motivated the development of version 5.0 of the DSL Method for hearing instrument fitting.

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Section: The Linear Gain Erasupporting

confidence: 84%

The DSL Method for Pediatric Hearing Instrument Fitting: Historical Perspective and Current Issues

Seewald

Moodie

Scollie

et al. 2005

Trends in Amplification

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“…The greater the amount of saturation, then the stronger the preference for compression limiting over peak clipping (Hawkins and Naidoo, 1993;Storey et al, 1998). Figure 8 shows results of electroacoustic tests of the same programmable hearing aid, set for peak clipping (top panel) or compression limiting (lower panel).…”

Section: Souzamentioning

confidence: 99%

Effects of Compression on Speech Acoustics, Intelligibility, and Sound Quality

Souza

2002

Trends in Amplification

151

125

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time, use of compression hearing aids has increased dramatically, from half of hearing aids dispensed only 5 years ago to four out of five hearing aids dispensed today (Strom, 2002b). Most of today's digital and digitally programmable hearing aids are compression devices (Strom, 2002a). It is probable that within a few years, very few patients will be fit with linear hearing aids. Furthermore, compression has increased in complexity, with greater numbers of parameters under the clinician's control. Ideally, these changes will translate to greater flexibility and precision in fitting and selection. However, they also increase the need for information about the effects of compression amplification on speech perception and speech quality. As evidenced by the large number of sessions at professional conferences on fitting compression hearing aids, clinicians continue to have questions about compression technology and when and how it should be used. How does compression work? Who are the best candidates for this technology? How should adjustable parameters be set to provide optimal speech recognition? What effect will compression have on speech quality? These and other questions continue to drive our interest in this technology. This article reviews the effects of compression on the speech signal and the implications for speech intelligibility, quality, and design of clinical procedures.Categorizing Compression tensity vowels such as /i/, and from whispered speech to shouting, the benefit of a linear hearing With a linear hearing aid, a constant gain is ap-aid is restricted when the amplification needed to plied to all input levels until the hearing aid's sat-make low-intensity sounds audible amplifies uration limit is reached. Because daily speech in-high-intensity sounds to the point of discomfort. cludes such a wide range of intensity levels, from In other words, linear hearing aids have a limited low-intensity consonants such as /f/ to high-in-capacity to maximize audibility across a range of 131 From the

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“…Furthermore, there is no reason to expect that the same maximum output level, however it is measured, would be optimal for each type of limiting. Indeed, Storey et al (1998) found that it is acceptable for OSPL90 (as assessed by pure tones) to be reduced to lower values for compression limiting than for peak clipping, without adversely affecting sound quality. Storey et al also showed that for any particular limiting system, there is a range of maximum output settings that are regarded by the hearing aid wearer as being equally acceptable.…”

Section: Discussionmentioning

confidence: 99%

“…(1991), we had expected that individuals with profound hearing loss and who preferred the highest output settings would generally prefer peak clipping because of the higher SPLs that peak clipping could provide. On the basis of the results of Storey et al (1998), Hawkins and Naidoo (1993), and Larson et al (2000), we expected that persons with moderate hearing losses would generally prefer compression limiting because of its lower distortion. There are several possible reasons that the anticipated outcome did not occur.…”

Section: Fig 2 Distribution Of the Number Of Times Participants Chomentioning

confidence: 99%

Experimental Evaluation of Different Methods of Limiting the Maximum Output of Hearing Aids

et al. 2006

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The National Acoustic Laboratoriesʼ Procedure for Selecting the Saturation Sound Pressure Level of Hearing Aids: Experimental Validation

Cited by 23 publications

References 7 publications

The DSL Method for Pediatric Hearing Instrument Fitting: Historical Perspective and Current Issues

The DSL Method for Pediatric Hearing Instrument Fitting: Historical Perspective and Current Issues

Effects of Compression on Speech Acoustics, Intelligibility, and Sound Quality

Experimental Evaluation of Different Methods of Limiting the Maximum Output of Hearing Aids

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