NoiseThreat Platform

Environmental Noise Monitor

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Standby

Record 10 seconds of audio to analyze the noise levels around you.

Current Status

Press start below to analyze your environmental noise footprint.

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Did You Know?

Invisible noise can trigger stress and ruin your focus without you even realizing it. Take just 10 seconds to find out if your space is safe!

Silent Impact

Constant low-level noise can entirely disrupt your natural sleep cycles.

Just 10 Seconds

Instantly check your surroundings' Noise Pollution Index (NPI) score.

Health First

Analyze the data to know exactly when your ears need a break to recover.

In-Depth Analysis

Peak Noise 0dB

Lowest Noise 0dB

Fluctuation 0dB

Dominant Pitch 0Hz

Health Impacts of Noise

Crucial Precautions

Protective Measures (Do's)

Harmful Practices (Don'ts)

Standard Noise Guidelines

International and national limits for safe environmental sound levels.

WHO Guidelines

Residential Day Limit 55 dB

Residential Night Limit 45 dB

CPCB (India) Limits

Residential Area Safe Living Zones

55 dB (Day) 45 dB (Night)

Commercial Area Markets & Offices

65 dB (Day) 55 dB (Night)

The Noise Pollution Index (NPI) Scale

Safe (0-55 dB)

Perfect environment for rest, deep sleep, and complete focus.

Moderate (56-70 dB)

Acceptable for normal daytime activities, but may cause light fatigue over time.

Unhealthy (71-85 dB)

Prolonged exposure causes stress, raises blood pressure, and hurts focus.

Dangerous (85+ dB)

High risk of permanent hearing damage. Evacuate or use heavy ear protection.

The Science Behind NoiseThreat

1. Acoustic Energy to Decibels (dB)

We capture raw audio data using the browser's native Web Audio API. The raw microphone signal is processed using the Root Mean Square (RMS) method to determine the sound's true acoustic power. Because human hearing is non-linear, we convert this power into a logarithmic decibel scale.

dB = 20 × log₁₀(RMS) + Calibration_Offset

2. The Noise Pollution Index (NPI) Formula

Decibels can be confusing to the general public. We developed the proprietary Noise Pollution Index (NPI) to translate complex acoustic data into a simple 0-100 score. The formula mathematically maps the standard human hearing range—from a quiet whisper (30 dB) to the threshold of pain (120 dB)—into an easy-to-understand percentage.

NPI = [ (Measured_dB - 30) / 90 ] × 100

3. Dominant Frequency & Pitch (Hz)

To understand the type of noise, we utilize the Fast Fourier Transform (FFT) algorithm. FFT mathematically slices the incoming audio signal into thousands of frequency bins, allowing us to pinpoint the dominant pitch. This helps categorize if the threat is a low-frequency rumble (like machinery, < 300Hz) or a high-pitched danger (like a siren, > 2000Hz).

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