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Biomedical subjects

C G Rice

Publications and source records attributed to C G Rice.

18 recordsLinked to original sources
PubMed1990

Binaural hearing aids for high-frequency hearing loss.

A recent study has examined the differences between certain monaural and binaural frequency responses as used in hearing aids for persons with high-frequency (often noise induced) hearing loss, in terms of both speech discrimination score and subjective rating methods. Slight variations in speech discrimination score resulted from changing the frequency response of a monaurally fitted aid while subjective preferences favoured an aid with adaptive low-frequency gain regulation for more severe high-frequency losses. A much more pronounced improvement, was however found for a binaural fitting of the preferred aid, resulting in increased discrimination score and subjective ratings of sound quality, speech clarity and overall impression. A binaural fitting of a subjectively preferred monaural hearing aid produced speech discrimination scores which were at least as good as, if not better than, those obtained from the optimum monoaural fitting. These findings are thought to have important implications for the fitting of hearing aids.

Hearing Aids↗
PubMed1987

Sound levels from personal cassette players.

Techniques have been devised whereby the levels at which users of personal cassette players listen to tape-recorded sounds through lightweight headphones may be measured and expressed in terms of free-field equivalent continuous A-weighted sound pressure levels. Data have been obtained on over 60 users of such devices who variously listened, in laboratory and field conditions, to music and speech against quiet and noisy backgrounds. The results have been interpreted in terms of noise exposure. Comparison with damage risk criteria indicates that 5% of the sample are listening in such a manner that habitual use would constitute a damage risk to hearing.

Hearing Loss, Noise-Induced↗
PubMed1987

Damage risk from personal cassette players.

Studies of the listening habits of personal cassette player users have been carried out in both Southampton and Turin. The results have been compared with other researches carried out independently in London and Nottingham. Patterns of noise exposure have been examined and estimates of hearing damage risk hypothesised. Habitual users of such devices could suffer adverse effects and should be aware of the symptoms associated with temporary threshold shifts in hearing.

Adolescent↗
PubMed1987

Self-noise problems in hearing aids.

A study has been carried out to determine the extent to which the self-noise of a hearing aid constitutes a problem for aid users. A survey of hearing aid users was carried out followed by a laboratory study. None of the 75 hearing aid users seen during the survey complained of being troubled by self-noise and none of the subjects investigated at the Institute of Sound and Vibration Research was able to hear any self-noise at normal aid settings when listened for in a sound proofed room. Tests confirmed that aid noise becomes audible only when the noise level in any 1/3 octave band rises above the threshold for a pure tone at the centre of that band, and typical equivalent input noise levels indicate that audible self-noise is caused by gain being applied over a frequency band where the aid user has negligible or no hearing loss, as is likely in the case of persons with 'ski-slope' hearing loss. It is suggested that anyone else complaining of problems with self-noise is probably mistaking external background noise for self-noise of the aid.

Adult↗
PubMedDate not supplied

Selecting a computerized billing system--a dynamic process.

This case study of the procedures used by the College of Physicians and Surgeons of Columbia University in selecting a computerized billing service provides a model for other institutions with similar needs for evaluating billing systems.

Accounting↗
PubMedDate not supplied

Women at the top.

Management has long been male dominated, but recently women have been entering the field in increasing numbers. This influx has required the management establishment to think and behave in new ways.

Administrative Personnel↗