Clinical Applications of Low Frequency Sound
1971; Informa; Volume: 5; Issue: 2 Linguagem: Inglês
10.3109/00381797109075538
ISSN1471-2849
AutoresMargaret J. Evans, Michael Bryan, W. Tempest,
Tópico(s)Phonocardiography and Auscultation Techniques
ResumoAbstractThe frequency response of the inner ear is discussed, together with available data on the human response to intense low frequency sound, and it is concluded that sounds of sufficient intensity can produce balance disturbances in both humans and guinea-pigs. The possible clinical application of this effect is considered and an experiment to further investigate the influence of low frequency sound on balance is described. The results of this experiment show that intensities of 140dB and over can produce symptoms of balance disturbance, including a vertical nystagmus, in some normal observers, the effect being greatest at a frequency of about 7Hz. Tests on two pathological individuals, with a known history of sensitivity to balance disturbance, showed a high sensitivity to low frequency sound, showing severe symptoms at levels of 105 and 140dB respectively.
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