# Noise Monitor - 噪音計 — sound measure, decibel meter

> sound measure, decibel meter (iPhone/iPad app by John Xu.)

- Source: https://appshunter.io/ios/app/noise-monitor/id6780465715 (this page in markdown: same URL + `.md`)
- Developer: [John Xu](https://appshunter.io/developer/1863850937)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.6 · 3 MB
- Languages: American English
- Released: 2026-06-28
- Data updated: 2026-08-13
- User reviews in markdown: https://appshunter.io/ios/app/noise-monitor/id6780465715/reviews.md

## What is Noise Monitor?

Transform Your Device Into a Professional Sound Level Meter

Noise Monitor - 噪音計 delivers laboratory-grade noise monitoring right on your device. Whether you're an occupational safety professional, audio engineer, or simply concerned about noise exposure, our app provides the precision tools you need to measure, track, and analyze sound levels in any environment.

PROFESSIONAL MEASUREMENT TOOLS

• Real-time decibel monitoring with smooth animations
• A, C, and Z frequency weighting support
• Multiple industry standards (OSHA, NIOSH, EU)
• Peak, minimum, and maximum level tracking
• LAeq (equivalent continuous sound level)
• TWA (time-weighted average) calculations
• Noise dose percentage monitoring
• Maximum safe exposure time estimates

MODERN INTERFACE

Experience sound measurement reimagined with our stunning visual design:
• Dynamic animated gauge with color-coded risk levels
• Real-time waveform backgrounds that respond to noise
• Glass-style cards with elegant data presentation
• Smooth transitions and haptic feedback
• Easy-to-read statistics at a glance

COMPREHENSIVE HISTORY & TRACKING

Never lose a measurement with our robust history features:
• Automatic session recording and storage
• Detailed measurement sessions with full statistics
• Time-stamped data for compliance documentation
• Historical trend analysis
• Export capabilities for reporting

OCCUPATIONAL SAFETY COMPLIANCE

Built with workplace safety in mind:
• OSHA 1910.95 standard support
• NIOSH recommended exposure limits
• European Union directive compliance
• 8-hour dose projections
• Action level and criterion level indicators
• Safe exposure time calculations

AUDIO WEIGHTING OPTIONS

Choose the right weighting for your needs:
• A-weighting: Human hearing perception (most common)
• C-weighting: High-level measurements and peak sounds
• Z-weighting: Flat frequency response for technical analysis

PERFECT FOR

• Occupational health and safety professionals
• Construction site monitoring
• Factory and industrial environments
• Audio engineers and musicians
• Home theater calibration
• Noise complaint documentation
• Environmental noise assessment
• Hearing protection awareness
• Educational purposes

PRIVACY FOCUSED

Your measurement data stays on your device. We don't collect, store, or transmit your sound measurements to any external servers. All data remains private and under your control.


Download Noise Monitor - 噪音計 today and take control of your acoustic environment. Protect your hearing, ensure workplace safety, and make informed decisions about noise exposure.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 20 Spirit Stones | $0.99 | one-time |
| 100 Spirit Stones | $2.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/noise-monitor/id6780465715/reviews.md

### 5/5 — Very helpful

*2026-06-29*

Easy to use

## Version history (last 1 release)

### 1.0 — 2026-06-28

No release notes.

## More apps by John Xu

- [waft: make my day](https://appshunter.io/ios/app/waft-make-my-day/id6756945374)
- [chess-replay](https://appshunter.io/ios/app/chess-replay/id6761441253)
- [Chess Universe - Play Offline](https://appshunter.io/ios/app/chess-universe-play-offline/id6761792472)
- [Find Pharmacy - Remind Drug](https://appshunter.io/ios/app/find-pharmacy-remind-drug/id6771808215)
- [Secret Calendar Nav](https://appshunter.io/ios/app/secret-calendar-nav/id6788365414)

All apps by John Xu: https://appshunter.io/developer/1863850937

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*