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Biomedical subjects

B C Grover

Publications and source records attributed to B C Grover.

4 recordsLinked to original sources
PubMed1992

Do induction loops pose a hazard to health?

The RNID actively promotes the use of induction loops as a means of improving communication using hearing aids, particularly in public places. The magnetic flux density, 100-500 nT, needed for effective performance is comparable with fields to which people are exposed every day in the home, and much less than those which can be encountered in the work environment. In the light of current scientific knowledge, the risks to health would appear to be minimal.

Electromagnetic Fields↗
PubMed1979

Physical and subjective correlates of earmould occlusion.

Physical and subjective aspects of earmould occlusion are examined and related. In particular, measurements made in an ear-like coupler for various venting arrangements are compared with those obtained subjectively by a loudness balance procedure. The results demonstrate the effectiveness of an open (completely non-occluding) earmould at low-frequency sound reduction but indicate some of the factors which make its individual effect difficult to predict. It is further seen the group of hearing-impaired persons was less able to make systematic judgements on sound quality than was the control group of normally hearing persons.

Audiometry↗
PubMed1978

Some aspects of auditory space, speech perception and the use of hearing aids.

The auditory space of an individual is operationally defined as that perceptual area that lies between the upper tolerance level for loud sounds and the threshold of hearing for a specified range of frequencies. Results from recent experimental work are presented to show a difference of some 15 dB between comfortable listening level and loudness discomfort-level, up to 80 dB hearing loss. Results are also shown for the measurement of reaction time to a 2AFC task testing the ability to discriminate initial consonants. Loudness scaling is suggested as a method of eliciting supra-threshold measurements which might be helpful in the fitting of hearing aids.

Audiometry, Speech↗