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Cognitive Impact on Children from Airplane Noise

Cognitive Impact on Children from Airplane Noise. 2008. Outline . Concepts and Definitions General Health Effects School Studies Conclusions and Future Actions. Concepts and Definitions. NOISE = UNWANTED SOUND. Measurements.

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Cognitive Impact on Children from Airplane Noise

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  1. Cognitive Impact on Children from Airplane Noise 2008

  2. Outline • Concepts and Definitions • General Health Effects • School Studies • Conclusions and Future Actions

  3. Concepts and Definitions NOISE = UNWANTED SOUND

  4. Measurements • Measured as oscillation of air pressure (scientific) and unwanted (value judgment) • The intensity of sound waves produce a sound pressure level which is measured in the Decibel (dB) • Db use a logarithmic scale to accommodate the large range of values a human ear can detect.

  5. Increase of 3-5 dB is significant • Increase of 10 dB is a doubling of sound • Increase of 15 dB is four times as loud

  6. Noise Guidelines

  7. Sources of Noise

  8. Weighted Sound Measurements • Day night sound level – Ldn- (weigthed over 24 hr period with a 10dB penalty for night time hours where annoyance may be highest)

  9. The average increase in air craft noise within the Redesign Area is estimated at 4.5 – 5.9 dB

  10. Health Effects • The reported non-auditory effects in noise range from social psychological effects such as annoyance, effects on mental health, effects on sleep, effects on performance to stress related health effects such as hypertension and ischaemic heart disease. Exposure to noise constitutes a health risk. (Health Council Netherlands)

  11. Health Effects • Annoyance/Stress • Hypertension (HYENA) • Sleep Disturbances • Hearing loss • Effects on learning

  12. Cognitive Impacts on Children • The School Studies • Los Angeles • Munich • London • Ranch (Road traffic and air noise exposure and childrens cognition and health) • FICAN (Federal interagency commission on aviation noise)

  13. Dose Response

  14. Conclusions • Chronic exposure to air craft noise impairs reading and ability to perform complicated tasks • Linear exposure effect response seen at 5db increases • Increase of 5 dB leads to 1-2 month delay in reading • Effect of noise is cumulative • Reduction in noise lead to reduction in impairment. Or the effect of noise on cognitive abilities appears to be reversible

  15. Community impacts: The increase of 3-5 dB in a community will be experienced as a doubling in noise Sound quality in a community can add or detract to the sense of social well being Public health impacts: Increased levels in hyper tension and stress hormones as well as sleep interruption can lead to other more serious health problems Cognitive impacts: Decreased cognitive function in children can have significant impact on test scores, school funding, and future learning Aviation Noise Impacts

  16. Future Actions • Is the FAA using the right metrics? • Alternatives to the day-night average • Alternatives to the FAA 65 dB threshold • Take susceptibility into account • Dose response • Cognitive impacts • Health impacts • Treat noise as an independent environmental stressor

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