Related Experiment Video
Updated: Aug 6, 2026
09:23
A Low Cost Setup for Behavioral Audiometry in Rodents
Published on: October 16, 2012
Dose-response relationships for traffic noise and annoyance
Archives of Environmental Health
|January 1, 1986
Summary
Annoyance from road traffic noise is primarily determined by the maximum noise level, not the overall noise level (Leq) or the number of heavy vehicles. This finding suggests a new model for environmental noise standards.
Area of Science:
- Environmental Health
- Acoustics
- Psychology
Background:
- Road traffic noise is a significant environmental stressor impacting public well-being.
- Existing noise assessment metrics like Leq may not fully capture human annoyance.
- Understanding the relationship between noise exposure and annoyance is crucial for public health policy.
Purpose of the Study:
- To investigate the relationship between various road traffic noise metrics and public annoyance.
- To determine which noise parameters best predict the extent of population annoyance.
- To propose a refined model for human reaction to environmental noise.
Main Methods:
- Conducted noise measurements in 18 distinct areas across five countries.
- Performed 1379 interviews to assess public annoyance levels.
- Analyzed correlations between noise metrics (Leq, maximum noise level, heavy vehicle counts) and reported annoyance.
Main Results:
- A poor correlation was found between the equivalent continuous sound level (Leq) and the "very annoyed" population (rxy = 0.03).
- Increasing heavy vehicle traffic from 1000 to over 3000 per 24 hours did not significantly increase annoyance.
- The maximum noise level exhibited the highest correlation with reported annoyance.
Conclusions:
- Human annoyance to traffic noise appears to be driven by the highest noise events from single vehicles, rather than cumulative exposure.
- The findings support a dose-response model where exceeding a certain noise threshold is more critical than the frequency of events.
- This maximum noise level model, validated across aircraft, train, and traffic noise, warrants consideration for environmental noise standard development.
Related Concept Videos
01:03Dose-Response Relationship: Overview
Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
01:22Dose-Response Relationship: Potency and Efficacy
The potency of a drug is the measure of its ability to produce a biological response and can be compared by looking at the half-maximum effective concentration or EC50 values of different drugs. A lower EC50 value indicates higher potency of the drug. In the dose–response curve of two antihypertensive drugs, candesartan and irbesartan, a significant difference is observed in their EC50 values. A lower EC50 value for candesartan indicates that it is more potent than irbesartan, as it produces...
01:25Dose-Response Relationship: Selectivity and Specificity
Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and β2-adrenergic receptors...
01:28Pharmacokinetic–Pharmacodynamic Relationship: Dose to Pharmacological Effect
A drug’s dosage and pharmacokinetic properties determine how quickly it acts, how intense its effects are, and how long it lasts. Higher doses increase drug concentration at receptor sites, producing a hyperbolic curve when pharmacologic response is plotted against drug dose. Converting this scale to a log-linear format results in a sigmoidal curve, better representing dose–response relationships.For drugs following a one-compartment model, the pharmacologic response is directly proportional to...
01:23Pharmacokinetic–Pharmacodynamic Relationship: Intensity of Dose-Effect Relationship
Pharmacodynamics explores the relationship between drug concentration and its effect. In a quantal response drug, the duration of action better correlates with drug concentration, while for graded effect drugs, the intensity of response is more relevant. This intensity depends on the dose, drug removal rate, and the region of the concentration–response curve.The concentration–response curve can be divided into three regions. Region 3 (80–100% maximum response) demonstrates that even as drug...
01:21Dose Response Curve: Conventional Versus Nonmonotonic
The correlation between a drug's dosage and its impact on a biological system is a cornerstone of pharmacology and toxicology. Conventional dose–response curves, which include graded and quantal relationships, are key to this understanding. Graded dose–response curves depict the spectrum of a biological reaction to different doses within an individual, indicating that as the drug dosage increases, so does the intensity of the response. On the other hand, quantal dose–response relationships...