A report is given of a patient who produces a continuous high-pitched tone (3,400 hertz 10 Hz—35 dB sound pressure level) from her right ear.
The tone is not audible to the patient. She has a circumscribed sensorineural threshold dip with a maximum of 35 dB at 3,500 Hz. The sound appeared to be emitted by the ear drum and is probably a result of an anomaly of the venous system at the base of the skull near the ear.
The threshold dip at about the same frequency as the tone remains unexplained.
Huizing EH, Spoor A. An Unusual Type of Tinnitus: Production of a High Tone by the Ear. Arch Otolaryngol. 1973;98(2):134–136. doi:10.1001/archotol.1973.00780020140017
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