TWA Noise Exposure Calculator

TWA Noise Exposure Calculator calculator can be used to calculate the Time-Weighted Average (TWA) noise exposure level in decibels (dB) over a specified period of time.

Input Parameters

Calculation Results

Calculation Formula

TWA = 10 * log10(Σ(10^(L_i/10) * t_i) / Σ(t_i))

Where:
TWA = Time-Weighted Average noise level in dB
L_i = Noise level in dB for each segment
t_i = Duration in hours for each segment
Σ = Summation over all segments

Result

TWA Noise Level: -- dB

TWA Noise Exposure Calculator Usage Guide

Learn how to use the TWA Noise Exposure Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the total duration of noise exposure in hours in the "Duration" field.
  2. In the "Noise Levels (dB) per Duration Segment" field, enter the noise levels in dB for each segment of the duration, separated by commas. For example, if the duration is 8 hours and you want to enter noise levels for 8 segments of 1 hour each, you would enter: "85, 88, 90, 92, 95, 88, 90, 87"
  3. Click the "Calculate" button to compute the TWA noise level.
  4. The result will be displayed in the "TWA Noise Level" field.

Working Principle

The Time-Weighted Average (TWA) noise exposure level is calculated by taking into account the noise levels and the duration of exposure to those levels over a specified period of time. The formula used is:

TWA = 10 * log10(Σ(10^(L_i/10) * t_i) / Σ(t_i))

Where:

  • TWA = Time-Weighted Average noise level in dB
  • L_i = Noise level in dB for each segment
  • t_i = Duration in hours for each segment
  • Σ = Summation over all segments

This calculator assumes that each segment has a duration of 1 hour unless specified otherwise. If the duration of each segment is different, you need to adjust the input accordingly.