Source-based subjective responses to sleep disturbance from transportation noise

Area of Science:

• Environmental Health
• Acoustics
• Sleep Science

Background:

• Subjective responses to environmental noise are increasingly recognized for assessing sleep disturbance.
• Real-world studies on traffic noise and sleep disturbance are limited.
• Existing noise metrics may not fully capture the impact on sleep.

Purpose of the Study:

• To evaluate the effectiveness of subjective responses in assessing night-time sleep disturbance from various transportation noise sources.
• To compare subjective sleep disturbance across residential sites with dominant road, light rail, and aircraft noise, plus a control site.
• To determine the adequacy of continuous equivalent noise level measures in representing sleep disturbance.

Main Methods:

• Utilized 208 household questionnaire surveys to collect subjective responses on sleep disturbance and annoyance.
• Assessed four residential sites characterized by dominant noise sources (road, light rail, aircraft).
• Compared findings with a control site having minimal transportation noise.

Main Results:

• Subjective responses proved robust in assessing sleep disturbance from road traffic noise in a real-world setting.
• Continuous equivalent noise level measures were found to be inadequate indicators of night-time disturbance.
• Relying solely on noise measurement data can lead to inaccurate assessments of sleep disturbance.

Conclusions:

• Subjective responses are a valuable tool for assessing night-time sleep disturbance caused by transportation noise.
• Objective noise measurement data alone is insufficient for accurately gauging sleep disturbance.
• Integrating objective measurement data with subjective response data is crucial for accurate assessment of transportation noise impacts on sleep.