Authors: Todd, Neil; Rosengren, Sally; and Colebatch, James
- This study is published in a peer review journal.
- Reasearchers tested subjects (against a control subject) with a wide range of low frequency noise and infrasound at varying intensities
The tests showed: ‘that what you can’t hear can harm you”
- The link to low frequency noise from wind turbines appears to send false signals to the highly sensitive structures within the inner ear (otolith organs & semicircular canals), causing dizziness, vertigo, and nausea, along with cognitive and memory deficits, and anxiety and panic attacks. The latter behavioral symptoms are tied to the inner ear, as Dr. Pierpont’s book explains.
- This research provides scientific evidence for Dr. Pierpont’s contention regarding the effects of wind turbine noise/vibration on the human vestibular system (i.e., inner ear)
- An affected vestibular apparatus, is the core of Wind Turbine Syndrome, as Pierpont conjectured in her forthcoming publication. This article provides substantial evidence that she’s correct.
Abstract. Mechanoreceptive hair cells of the vertebrate inner ear have a remarkable sensitivity to displacement, whether excited by sound, whole-body acceleration or substrate-borne vibration. In response to seismic or substrate-borne vibration, thresholds for vestibular afferent fibre activation have been reported in anamniotes (fish and frogs) in the range −120 to −90 dB re 1g.
In this article, we demonstrate for the first time that the human vestibular system is also extremely sensitive to low-frequency and infrasound vibrations by making use of a new technique for measuring vestibular activation, via the vestibulo-ocular reflex (VOR). We found a highly tuned response to whole-head vibration in the transmastoid plane with a best frequency of about 100 Hz. At the best frequency we obtained VOR responses at intensities of less than −70 dB re 1g, which was 15 dB lower than the threshold of hearing for bone-conducted sound in humans at this frequency. Given the likely synaptic attenuation of the VOR pathway, human receptor sensitivity is probably an order of magnitude lower, thus approaching the seismic sensitivity of the frog ear. These results extend our knowledge of vibration sensitivity of vestibular afferents but also are remarkable as they indicate that the seismic sensitivity of the human vestibular system exceeds that of the cochlea for low frequencies.
Neil P. McAngus Todd
Faculty of Life Science, Jacksons Mill
University of Manchester
Manchester M60 1QD, U.K.
Sally M. Rosengren
James G. Colebatch
Prince of Wales Clinical School and Medical Research Institute
University of New South Wales
Randwick, Sydney, NSW 2031, Australia