The vocal cords vibrate very quickly when they are activated during phonation to produce sounds. This technique allows the rapid speed of movement of the vocal cords to be slowed down so that a detailed assessment of the rhythmic oscillations of the surface of the vocal folds can be made.
The test involves placing a small external surface plate about the size of a stethoscope over one side of the voice box. This enables the frequency of the oscillations of the vocal folds to be measured. An exact adjustment of the wavelength of the special strobe xenon illuminating light can be made, which results in an image of the vocal cords vibrating at a very much slower rate.
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Dr Gerald Brookes is regularly consulted by the media for his expertise. He has been interviewed by the Daily Mail, featured on Channel 4's Embarassing Bodies, looked after The X-Factor contestants and recently, appeared on BBC Radio 2 with Chris Evans.
Media: Channel 4
Adele was experiencing dizziness and balance problems so severe that she could barely function. In desperation, after consulting her GP to no avail, she got in touch with Channel 4’s Embarrassing Bodies team. The show then contacted Dr Gerald Brookes, who was able to diagnose her rare condition as Basilar Migraine.
Catherine Eade was having dizzy spells and balance problems. When inexplicably she started suffering memory loss too, she consulted Dr Gerald Brookes at The Harley Street ENT Clinic who correctly diagnosed her problem as benign paroxysmal positional vertigo (BPPV).
The Harley Street ENT Clinic looked after The X-Factor TV show contestants for many seasons. At the end of the 2010 season, Dr Gerald Brookes was interviewed by Nicky Broyd of Boots WebMD on the perils of high pressure performing.