# Sound Level Meter: Decibel

> Noise Analyzer · SPL & dBA Leq

Canonical page: [https://chrome-stats.com/d/id6745488403](https://chrome-stats.com/d/id6745488403)

## Overview

- **ID:** `id6745488403`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Raphael Goupille
- **Category:** Utilities
- **Version:** 1.1
- **Last updated:** 2026-05-26
- **First published:** 2025-06-03
- **Size:** 35 MB
- **Data as of:** 2026-09-18
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/sound-level-meter-decibel/id6745488403)
- **Website:** [https://sonometredecibelmeter.blogspot.com](https://sonometredecibelmeter.blogspot.com/)
- **Privacy policy:** [https://sonometredecibelmeter.blogspot.com](https://sonometredecibelmeter.blogspot.com/)

## Description

Pro-grade dB meter — A/C/Z weighting, 1/3-octave bands, calibration & instant A4 PDF reports. IEC 61672-1 compliant.

Measure noise like a pro — straight from your iPhone.

Sound Level Meter: Decibel turns your iPhone into a precision SPL meter, engineered to the IEC 61672-1 international standard. Protect your hearing, document a noise complaint, tune a studio, or pre-check a workplace - reliable readings in seconds, clean A4 PDF reports in one tap.                                  

KEY FEATURES

  • Real-time dB readings with A, C and Z weighting — switch on the fly
  • Fast (125 ms), Slow (1 s) and Impulse time integration — the modes pros use
  • 1/3-octave frequency analysis                                                                          
  • Multiple live visualizations: histogram, gauge, circle meter, applause meter, basic graph
  • All metrics in one place: LAeq, Min, Max, Avg, Peak                                                    
  • Save full measurement sessions with timeline, location and notes
  • Calibration screen for fine-tuning against any reference meter                                         
  • Available in English, French, German, Spanish, Italian, Japanese, Chinese
  • Distraction-free dark interface focused entirely on your data                                          
                                                                 
DESIGNED FOR ACCURACY
Sound Level Meter: Decibel follows the IEC 61672-1 sound level meter specification:
  • True biquad-cascade A and C weighting filters — not generic high/low-pass approximations               
  • Exponential averaging on squared pressure (the correct method)                          
  • Per-device calibration based on the iPhone hardware actually in use                                    
  • User-adjustable offset to align with any reference meter or calibrator                                 

IDEAL FOR                                                                                                
  • Audio engineers tuning studios, venues and rehearsal spaces
  • Workplace safety pre-checks before a formal acoustic survey                                            
  • Musicians, DJs and podcasters watching their hearing exposure
  • Parents monitoring nursery or kids' bedroom noise levels                                               
  • Tenants documenting noise from neighbors, traffic or construction
  • Anyone serious about long-term hearing health                                                          

FAQ                                                 
How accurate is it?
After one-time calibration against a known reference, expect 2–3 dB of typical accuracy in the 40–95 dB range. Maximum measurable level is bounded by your iPhone hardware (around 104–110 dB).

Does it replace a certified sound level meter?
For monitoring, awareness and personal documentation: yes. For legally certified acoustic measurements, dedicated class 1/2 hardware remains the reference.

Can I export my measurements?
Every saved session generates an A4 PDF with full stats and the timeline graph. Print it, email it, AirDrop it — anywhere PDFs work. 

Why do I see different values than another decibel app?
iPhone microphone sensitivity varies between models, and each app handles calibration differently. Use the built-in calibration screen to align with a trusted reference.
                                                                                                       
How is my data handled?
Sessions are stored locally on your iPhone. Nothing is uploaded — your acoustic data stays yours.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy: https://sonometredecibelmeter.blogspot.com

## Rankings

- #2,034,547 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6745488403)