NoiseThreat Platform

Environmental Noise Monitor

Capture and analyze your sound environment.

Tap to Measure

Live Context

The system is standing by. Tap the giant circle to capture and analyze the sound levels in your environment.

Sound Equivalent ---

Why Measure Noise?

Invisible pollution affects your daily life more than you think.

Sleep Disruption

Even low-level constant noise can fragment your sleep cycles, leaving you exhausted.

Cognitive Stress

Background noise unconsciously triggers stress hormones, reducing focus and productivity.

Hearing Health

Prolonged exposure to environments above 85 dB leads to irreversible hearing damage.

Standards & Methodology

Understand how we classify noise and the global standards we follow.

The NPI Categorization Scale

Category	Range	Description
Safe	0-55 dB	Optimal environment for rest and deep sleep.
Moderate	56-70 dB	Acceptable for normal daytime activities.
Unhealthy	71-85 dB	Prolonged exposure causes stress and fatigue.
Dangerous	85+ dB	High risk of permanent hearing damage.

WHO Guidelines

Residential Day Limit 55 dB

Residential Night Limit 45 dB

CPCB (India) Limits

Residential Living Zones

55 dB (Day) 45 dB (Night)

Commercial Markets & Offices

65 dB (Day) 55 dB (Night)

Technical Methodology

1. Sound Energy to Decibels (dB)

Audio data is captured using the browser's native Web Audio API. The raw microphone signal is processed via the Root Mean Square (RMS) algorithm to determine the sound's physical power. This is then mapped to a logarithmic decibel scale reflecting human hearing perception.

dB = 20 × log₁₀(RMS) + Calibration_Offset

2. Dominant Frequency & Pitch (Hz)

The Fast Fourier Transform (FFT) algorithm slices the incoming signal into frequency bins, allowing the system to identify the dominant pitch. This distinguishes low-frequency rumbles (< 300Hz) from high-pitched alarms (> 2000Hz).

Dominant_Hz = (Peak_Bin_Index / Total_Bins) × (Sample_Rate / 2)

Environmental Noise Monitor

Live Context

Why Measure Noise?

Sleep Disruption

Cognitive Stress

Hearing Health

Signal Analysis

Protective Measures

Practices to Avoid

Health Impact