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Community Response to Aircraft Noise Exposure over Time

Community Response to Aircraft Noise Exposure over Time. Katja Wirth Kumamoto University, Japan Mark Brink & Christoph Schierz ETH Zurich, Switzerland. Content. Introduction Political background Methodology of the surveys Results Conclusion. 1. Introduction.

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Community Response to Aircraft Noise Exposure over Time

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  1. Community Response to Aircraft Noise Exposure over Time Katja Wirth Kumamoto University, Japan Mark Brink & Christoph Schierz ETH Zurich, Switzerland K. Wirth

  2. Content • Introduction • Political background • Methodology of the surveys • Results • Conclusion K. Wirth

  3. 1. Introduction • This presentation deals with 2 aircraft noise surveys, carried out in 2001 and 2003 around Zurich Airport. • 3 questions: • Changes in prevalence of annoyance between 2001 and 2003? • Changes in prevalence of annoyance between 1971 and 2001 / 1991 and 2001? • In areas with a step increase of noise exposure: overreactions? K. Wirth

  4. 2. Political Background • Aircraft noise is a big political issue in the greater Zurich area • Everyday subject in the media • Several incidents in the past few years • Most important are the problems with nearby Germany: Germany cancelled the treaty ruling the flights from and to Zurich airport over German territory -> never ending negotiations • High uncertainty about future aircraft noise K. Wirth

  5. 2. Political Background • Germany’s implemented regulation about overflights over German territory forced Zurich Airport to a new take-off and landing regime • Thus residential areas with few aircraft noise were newly affected by aircraft noise • This scenario allowed us to assess the changes in noise annoyance • at steady state circumstances • and at a step change in noise exposure K. Wirth

  6. 3. Methodology of the Surveys • Surveys carried out in August 2001 and August 2003 • Random samples out of 57 communities around the airport Zurich • 2001 • Questionnaire • Response rate = 52%: 1826 valid questionnaires • 2003 • Questionnaire and telephone interviews • If possible, addresses from 2001 were used again • Response rate = 35%: 1721 datasets • Noise measures calculated for the home of every subject K. Wirth

  7. Germany France Zurich Airport Austria Bern Italy 3. Methodology of the Surveys K. Wirth

  8. Since October 2001: Landing aircrafts early in the morning and late in the evening: step change in noise exposure. 3. Methodology of the Surveys K. Wirth

  9. 4. Results 4.1 Comparison 2001 and 2003 at Steady State Condition Is there any change of the prevalence of annoyance between 2001 and 2003? K. Wirth

  10. 4. Results 4.1 Comparison 2001 and 2003 at Steady State Condition No significant change in noise annoyance! K. Wirth

  11. 4. Results 4.2 Comparison with the 1971 survey Compared with a former noise survey carried out around Zurich Airport in 1971, was there any change in aircraft noise-induced annoyance at same sound levels? K. Wirth

  12. 4. Results 4.2 Comparison with the 1971 survey K. Wirth

  13. 4. Results 4.3 Comparison with the 1991 survey Compared with a former noise survey carried out around Zurich Airport in 1991, was there any change in aircraft noise-induced annoyance at same sound levels? K. Wirth

  14. 4. Results 4.3 Comparison with the 1991 survey K. Wirth

  15. In the data set of 2003 is there any effect of the step increase of noise exposure on annoyance detectable? 4. Results 4.4 Effect of a step increase in noise exposure K. Wirth

  16. e.g. opening of a new runway e.g. installation of noise insulation windows 4. Results 4.4 Effect of a step increase in noise exposure Overreaction Overreaction Higher annoyance than suspected Annoyance Noise level Annoyance Overreaction Less annoyance than suspected K. Wirth

  17. 4. Results • 4.4 Effect of a step • increase in • noise exposure Significant effect of the noise exposure situation on annoyance! K. Wirth

  18. 4. Results 4.4 Effect of a step increase in noise exposure Correlation coefficients noise exposure - annoyance K. Wirth

  19. 5.Discussion (1) • No change of dose response relationship between 2001 and 2003 if steady state noise condition • This is in agreement with a Dutch Study (2004) • Overreaction in areas with a step increase of noise exposure • Extent and persistence (almost 2 years) of these reactions is noteworthy, and in agreement with a study of Fidell et al. (2002) K. Wirth

  20. 5.Discussion (2) • No relationship between noise exposure and annoyance for subjects affected with step change of noise exposure • In contrast, relationship between increase of noise exposure and annoyance • It seems that the concerned residents refer not to the actual sound level, but to the change of sound level when asked about their noise annoyance K. Wirth

  21. Thank you for your attention! K. Wirth

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