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May 1948

Das akustische Trauma.

Arch Otolaryngol. 1948;47(5):703. doi:10.1001/archotol.1948.00690030729015

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This is a profound and enlightening study of the complex problem of acoustic trauma. The alliance between the otologist and the physicist proves its value throughout the monograph. The student of acoustic trauma obtains valuable information from the physical definitions, the noise spectrums, the oscillograph recordings, the pressure curves and the frequency analysis of explosions.

The biologic response of the ear was studied in clinical observations, animal experiments and histologic examinations of the ear. Two groups of aural traumas are described. The first group is composed of professional deafness, report trauma of small arms and blunt injuries of the head without fracture of the temporal bone. The symptom complexes of this series are similar in spite of the diversity of causes. Typical is the C-5 dip; in early cases it is the only finding, but later it widens to a broad perception type deafness.

In the second group are aural

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