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G Björkman

Publications and source records attributed to G Björkman.

14 recordsLinked to original sources
PubMed1985

Brain-stem auditory evoked potentials in different age groups.

Brain-stem auditory potential (BAEP) latencies were measured from individuals with normal or nearly normal hearing. Different age groups were studied separately. Males have 0.1-0.2 msec longer latencies of waves III and V and longer I-V IPLs than females in all age groups. The latencies of waves I, III and V increase 0.1-0.2 msec with increasing age, but the I-V IPL was the same in all age groups. The recognizability was very good for waves I, III and V and fairly good for waves II and IV. There was no interaural time difference.

Adolescent↗
PubMed1981

Measurement of eustachian tube function using sonotubometry.

Sound transport through the Eustachian tube in normal ears has been recorded using sonotubometry (Virtanen, 1978). It was found that only 66% of the ears had sound transport through the tube when swallowing. Despite the fact that all ears had adequate aeration of the middle ear at the time of testing, 34% of the ears had no sound passage when swallowing. The explanation for this phenomenon is discussed. Also, it is concluded that this test may reflect Eustachian tube patency during swallowing--and not tubal function.

Deglutition↗
PubMed1970

Tympanometry.

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Adult↗
PubMedDate not supplied

Tympanometry and acoustic impedance.

In recordings of the acoustic impedance of the middle ear (tympanometry) the change in air pressure in the ear canal will mostly influence the capacitive component of the acoustic impedance. By choosing a probe tone frequency close to the resonance frequency of the middle ear, characteristic tympanometric patterns can be demonstrated in certain middle ear lesions. The shapes of the curves are discussed in relation to the behaviour of the different components of the middle ear impedance.

Acoustic Stimulation↗