Safety and Regulations

The makes of the Mosquito, through extensive R&D has produced the MOSQUITO MK II unit that uses complex high frequency sound to chase away those annoying teenagers!

There are several reports available here, all of which have been compiled and written by independent third parties. Please feel free to read or download them. If you wish to re-print them, please contact us for permission first.

It should also be noted, that these reports were based on the Mosquito MK I, which had a fixed volume of 85 dB-A. The new MK II Mosquito has a built-in VOX system that automatically adjusts the volume of the Mosquito so that it is only 5 dB-A above the ambient noise levels in the immediate area.

Mosquito and the Modern Hearing Aid

"The Mosquito operates at 17.8 KHz which is more than double the frequency. In short, there will be no amplification of the sound output of the Mosquito by contemporary digital hearing aids."

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HSE Report on Sound Levels 2001

"A number of Damage Risk Criteria and Maximum Permissible Levels were first recommended by individual researchers in the 1960s. These tentative recommendations, supported by limited experimental and survey data, were then taken up by national and international bodies.

For the very high frequencies, 10-20 kHz, the limits were given as one-third-octave band Sound Pressure Levels in the range 75-85 dB, to avoid unpleasant subjective effects in exposed persons; higher noise levels were found to cause annoyance, tinnitus, headaches, fatigue and even nausea.

For ultrasonic components above 20 kHz, the limits were set to avoid hearing damage in the audible (lower) frequencies. One-third-octave band levels of 105-115 dB were observed to produce no temporary hearing loss, and were therefore judged non-hazardous in respect of permanent hearing damage.

Since the introduction of these recommended limits, there have been no reports showing systematic hearing loss trends associated with occupational exposure to very high frequency noise."

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NPL Report Relating to the Testing of Mosquito Against HSE Report on Sound Levels

"At 76 dBA at 3 m the Mosquito clearly would not present as noise hazard under the terms of these regulations. Even when the 8 hour limit is reduced to 80 dBA in 2006, over 16 hours of exposure to a level of 76 dBA is required to reach the daily noise limit. However consideration must be given to differences in the acoustical environment, the reproducibility of the acoustic output of the device and the actual distance to the observer in-situ"

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AERC Report 24.3.06 relating to Environmental legislation and the use of the Mosquito

Applied Environmental Research Centre Ltd (AERC) has been commissioned by Compound Security Systems (the client), to undertake a review of legislation associated with noise in the environment. The purpose of this assessment was to identify whether the "Mosquito" high frequency sound deterrent complies with current acoustic legislation.

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Relevant sections of document from legal counsel relating to clarification of points raised in AERC report 24.3.2006

"On the basis of evidence made available to us, we believe that the effect which the Mosquito Device has on young people in its vicinity is of such a minor and temporary nature that any claim that its use infringes anybody's human rights or constitutes an assault would be extremely weak."

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Human Rights Act Investigation Relating to Use of Mosquito

This document addresses ten (10) different human rights questions. The Mosquito works well within the limits of all identified human rights issues.

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