# Decibel Sound Meter: dB SPL — Noise Level & Loudness Test

> Mobile application to measure and display environmental noise decibel levels. (iPhone/iPad app by Grima Hdez.)

- Source: https://appshunter.io/ios/app/decibel-sound-meter-db-spl/id1501310833 (this page in markdown: same URL + `.md`)
- Developer: [Grima Hdez](https://appshunter.io/developer/1741481582)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 8 MB
- Languages: Korean, German (Germany), Russian, European Spanish, Arabic, American English, Italian, Japanese, Chinese (Simplified, China), European Portuguese and 1 more
- Released: 2020-03-08
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/decibel-sound-meter-db-spl/id1501310833/reviews.md

## What is Decibel Sound Meter?

Sound level meter(or SPL) app is shows a decibel values by measure the environmental noise, displays measured dB values in various forms. you'll experience tidy graphic design with high frame by this smart sound meter app.

Decibel meters also are referred to as sound level meters (decibel meters), noise detection, sound meters, noise detectors, and noise detectors.
Decibel meter may be a noise detection software that uses mobile microphone to live the ambient noise decibel (dB).
The current decibel size and curve are displayed during the method . With the decibel meter, you'll measure the present ring
The background level of the environment is straightforward and straightforward to use.

Functions:
- The dashboard displays the present noise decibel value
- Display min/aver/max/current decibel value
- Display decibel size change chart
- Auto decibel value calibrate
- Display test time

11 Levels of Noise:
120dB: thunder
110dB: rock 'n' roll
100dB: train
90dB: factory
80dB: busy street
70dB: busy traffic
60dB: conversation
50dB: quiet library
40dB: quiet park
30dB: whisper
20dB: leaves fall

Decibels: dB, dB(A), dBA, dB(C), dBV, dBm and dBi? What are they all?
The decibel (dB) may be a logarithmic unit wont to measure sound level. it's also widely utilized in electronics, signals and communication. The dB may be a logarithmic way of describing a ratio. The ratio could also be power, instantaneous sound pressure , voltage or intensity or several other things. afterward we relate dB to the phon and to the sone, which measures loudness.

What is a Sound level meter?
A sound level meter is employed for acoustic (sound that travels through air) measurements. it's commonly a hand-held instrument with a microphone. the simplest sort of microphone for sound level meters is that the condenser microphone[1], which mixes precision with stability and reliability. The diaphragm of the microphone responds to changes in atmospheric pressure caused by sound waves. that's why the instrument is usually mentioned as a instantaneous sound pressure Level (SPL) Meter. This movement of the diaphragm, i.e. the instantaneous sound pressure deviation (pascal Pa), is converted into an electrical signal (volts V). While describing sound in terms of instantaneous sound pressure (Pascal) is feasible , a logarithmic conversion is typically applied and therefore the instantaneous sound pressure level is stated instead, with 0 dB SPL adequate to 20 micropascals.

A microphone is distinguishable by the voltage value produced when a known, constant instantaneous sound pressure is applied. this is often referred to as the microphone sensitivity. The instrument must know the sensitivity of the actual microphone getting used . Using this information, the instrument is in a position to accurately convert the electrical signal back to a instantaneous sound pressure , and display the resulting instantaneous sound pressure level (decibels dB SPL).

Sound level meters are commonly utilized in sound pollution studies for the quantification of various sorts of noise, especially for industrial, environmental, mining[2] and aircraft noise. the present international standard that specifies sound level meter functionality and performances is that the IEC 61672-1:2013. However, the reading from a sound level meter doesn't correlate well to human-perceived loudness, which is best measured by a loudness meter. Specific loudness may be a compressive nonlinearity and varies at certain levels and at certain frequencies.These metrics also can be calculated during a number of various ways

Note:
Microphones in most IOS devices are aligned to human voice. the utmost values are limited by the device. Very loud sounds(over ~90 dB) might not be recognized in most device. So please use it as just an auxiliary tools.


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## Key features

- Measures environmental noise decibel values
- Displays dB values in various forms
- Tidy graphic design with high frame rate
- Uses mobile microphone for ambient noise measurement
- Shows current, min, average, and max decibel values
- Displays decibel change chart
- Auto decibel value calibration

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Decibel PRO year sub | $17.99 | per year |
| Decibel PRO mounth sub | $1.99 | per month |
| Decibel PRO week sub | $0.99 | per 7 days |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/decibel-sound-meter-db-spl/id1501310833/reviews.md

### 1/5 — え？

*2022-03-28, version 1.2.0*

ダウンロードしたけど試したら英語だし、使い方が分からない、もっとシンプルにして欲しい。☆0だわ。

### 1/5 — 計測しない

*2020-05-17, version 1.0*

近くで洗濯機が動いている状況でも-70に張り付いてました。マイクがオンになってないのかと確認しましたがそんなこともなく、他のアプリではちゃんと計測してくれたので即アンインストールしました。

## Frequently asked questions about Decibel Sound Meter

### What is Decibel Sound Meter used for?

Decibel Sound Meter is used to measure environmental noise levels and display the decibel (dB) values in various formats. It utilizes your mobile microphone to detect ambient noise and provides real-time readings.

### Does Decibel Sound Meter have ads?

Yes, Decibel Sound Meter contains advertisements. The app is free to download and use, with options for in-app purchases to enhance the experience.

### What are the subscription options for Decibel Sound Meter?

Decibel Sound Meter offers several subscription plans: a weekly subscription for $0.99, a monthly subscription for $1.99, and an annual subscription for $17.99. These plans likely unlock premium features or remove ads.

### How accurate is Decibel Sound Meter?

The app features auto decibel value calibration to improve accuracy. However, the accuracy of any sound level meter app can be influenced by the quality of the device's microphone and environmental factors.

### What information does Decibel Sound Meter display?

Decibel Sound Meter displays the current noise decibel value, as well as the minimum, average, and maximum decibel values. It also shows a chart of decibel level changes over time and the test duration.

### What noise levels correspond to common sounds in Decibel Sound Meter?

The app provides a helpful guide to noise levels, listing examples such as thunder at 120dB, rock 'n' roll at 110dB, a busy street at 80dB, and a whisper at 30dB.

### On which devices can I use Decibel Sound Meter?

Decibel Sound Meter is available for iPhone and iPad devices. It is designed to run on these Apple platforms.

### How often is Decibel Sound Meter updated?

The latest version of Decibel Sound Meter is 1.3.1, and it was last updated on March 14, 2026. This indicates a recent update, suggesting ongoing development and support.

## Version history (last 5 releases)

### 1.6.0 — 2026-08-18

• New free Exposure mode: session LAeq alongside the live SPL reading
• NIOSH REL and OSHA PEL dosimeter — accumulated dose %, 8-hour TWA, projected 8-hour dose and time remaining at the current level
• Calibration offset (±15 dB) so you can match a reference meter
• Exposure sessions saved on your device, with CSV export

### 1.5.0 — 2026-08-08

• Bug fixes and performance improvements

### 1.4.0 — 2026-08-06

• Improved translations across all supported languages
• Bug fixes and performance improvements

### 1.3.1 — 2026-03-14

What's New

-Removed outdated screenshots
-Updated libraries for improved stability
-Overall performance enhancements and bug fixes
-Added a video with decibel meter

Enjoy!

### 1.3.0 — 2025-12-31

What’s New

- New Professional PDF Export
Export your sound measurements to high-quality PDF reports, including charts, session data, device info, and location (when available).

- Improved Recording Experience
More reliable measurement sessions with better stability and smoother real-time updates.

- Measurement History
Automatically save past sessions with date, time, duration, and noise statistics for easy review.

- Updated App Icon
Brand-new, modern icon aligned with the latest iOS design language.

- Tested on iOS 26
Fully tested and confirmed to work correctly on iOS 26.

General performance and UI improvements

## Apps similar to Decibel Sound Meter

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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All apps by Grima Hdez: https://appshunter.io/developer/1741481582

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*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 2026-08-22.*