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The National Physical Laboratory (NPL) is the UK's National Measurement Institute and is a world-leading centre of excellence in developing and applying the most accurate measurement standards, science and technology.
Key report findings:
- The Mosquito had a fundamental output with a mean frequency at 16.8kHz and maximum frequency at 18.6kHz
- The Mosquito had an A-weighted sound pressure level at 3m of 76 dBA.
- The Mosquito did not present a noise hazard when assessed against the criteria detailed in the Noise at Work Regulation 1989 and those in the Control of Noise at Work Regulations 2005.
- The sound output of the Mosquito will cause no damage to human hearing even with prolonged exposure.
