What question did this study set out to answer?

Develop a calculation method for an intermittency ratio that quantifies temporal variations and distinct acoustic events in transportation noise exposure.

September 9, 2015Journal of Exposure Science & Environmental EpidemiologyOpen Access

Intermittency ratio: A metric reflecting short-term temporal variations of transportation noise exposure

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Authors

JWJean Marc WunderliSwiss Federal Laboratories for Materials Science and Technology RPReto PierenSwiss Federal Laboratories for Materials Science and Technology MHManuel Habermacher

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Implication

Methodological study demonstrates an intermittency ratio metric for transportation noise, indicating better characterization of event-driven exposures than standard average sound measures.

Key Points

Develop a calculation method for an intermittency ratio that quantifies temporal variations and distinct acoustic events in transportation noise exposure.
Formulated the intermittency ratio (IR) to represent the fraction of total acoustic energy produced by discrete noise events exceeding an emergence threshold.
Estimated maximum pass-by level distributions using traffic geometry (distance and angle), vehicle volume and speed, and single-event pass-by sound levels across vehicle classes.
Generated comparative noise maps simultaneously modeling equivalent continuous sound levels (Leq) and IR for road, rail, and aircraft scenarios.
Derived an intermittency metric that evaluates temporal variation without direct correlation to standard long-term average energetic measures (Leq).
Demonstrated through acoustic mapping that the intermittency ratio differentiates steady background exposure from high-impact individual pass-by events across diverse transport settings.

Cite This Study

Wunderli et al. (2015) studied this question.

synapsesocial.com/papers/69df42424fb243fc8e591cec https://doi.org/10.1038/jes.2015.56

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Implication

Methodological study demonstrates an intermittency ratio metric for transportation noise, indicating better characterization of event-driven exposures than standard average sound measures.

Intermittency ratio: A metric reflecting short-term temporal variations of transportation noise exposure

Discussion

Member takes

Implication

Key Points

Cite This Study

Intermittency ratio: A metric reflecting short-term temporal variations of transportation noise exposure

Discussion

Member takes

Implication

Key Points

Cite This Study

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