SoundMeter X13.1.5 - App Store

SoundMeter X turns your iPhone or iPad into a handheld data-logging sound level meter (SLM), data-logging noise dosimeter, stereo signal generator, multi-channel data recorder, and real-time whole or 1/3 octave band spectrum analyzer (subscription or perpetual license required for most features--14-day free trial available).

Input signals can be acquired from any available audio input path. Sensitivity calibration can also be performed for any audio input device and/or input channel. Direct hardware support (automatic sensitivity calibration, based on factory-defined values) for The Modal Shop’s 2-channel 485B39 USB-ICP interface and miniDSP’s UMIK-1, UMIK-2, and EARS microphones.

In addition to real-time sound level measurements, SoundMeter can stream raw sound data to audio files, and store acquired sound level data, including date, time, and location, in CSV or TXT (tab-delimited) files, MAT-files, or high-resolution PDF images for later retrieval from your device.

SoundMeter may be downloaded for free from the App Store. Additional tools and features are offered via in-app purchase.

The SoundMeter Pro subscription includes:
- User-defined custom metadata in saved audio and data files
- Level MeterLp, Leq, Lx sound levels
-- Standard Flat, A, C frequency weighting
-- Standard Fast, Slow, Impulse time weighting
-- Data logging. Data can be logged as often as every 0.1 seconds for up to 8 hours, every second for up to 72 hours, or every 10 seconds for up to two weeks.
-- Event notifications
- Max Levels Meter
-- Traffic-light-style meters make it easy to monitor 2 separate sound level thresholds in 2 independent user-defined frequency bands.
-- Define lower (warning) and higher (limit) sound level thresholds for overall (full audio band) levels as well as for individual octave frequency bands.
-- Store user-defined thresholds in files for later recall.
- Noise Dosimeter
-- 8-hour Noise Dose, Projected Dose, TWA calculations
-- Criterion Levels: 80, 85, 90 dB
-- Exchange Rates: 3, 4, 5 dB
-- Data logging. Data can be logged as often as every 0.1 seconds for up to 8 hours, every second for up to 72 hours, or every 10 seconds for up to two weeks.
- Real-time Octave Spectrum Analyzer (RTA)
-- Lp, Leq, Lx sound levels
-- Supports whole or 1/3-octave frequency bands
-- Standard Flat, A, C frequency weighting
-- Standard Fast, Slow, Impulse time weighting
-- NC, RNC, and NR references curves, NC, SIL, and NR values
-- Data logging. Data can be logged as often as every 0.1 seconds for up to 8 hours, every second for up to 72 hours, or every 10 seconds for up to two weeks.
- Multi-channel Data Recorder
-- Supports up to 8 channels
-- Live monitoring of recorded data
-- Metadata (including calibrated sensitivity) embedded in audio file (AIF, CAF, WAV), optionally saved in separate data file
- Stereo Signal Generator
-- Left and right outputs assigned to arbitrary hardware output channels
-- Random and pseudorandom (periodic) noise sequences with white or pink spectrum
-- Linear and logarithmic frequency sweeps
-- Dual periodic waveforms with arbitrary frequency and phase difference
- MultiTool
-- Powerful data monitoring and project management (Add 2-6 subtools, depending on screen size, and save configurations for easy recall at a later time.)
The SignalScope X Pro Tool Set subscription can be shared between SoundMeter X and SignalScope X. It unlocks all tools and features of the SoundMeter Pro subscription in SoundMeter X and all tools and features of the Pro Tool Set subscription in SignalScope X (iCloud login required).

Learn more about SoundMeter X at FaberAcoustical.com.

Subscription Terms:
- https://www.faberacoustical.com/apps/subscriptions/terms.html
Privacy Policy:
- https://www.faberacoustical.com/about/privacy.html
Terms and Conditions for FaberAcoustical.com:
https://www.faberacoustical.com/about/terms.html

Version History - Stability and minor cosmetic improvements.
- Fixed a crashing bug related to saving analyzer data in the MultiTool. 13.1.5 Sep 25 - Fixed a bug that could prevent full license activation for upgrade licenses
- Minor cosmetic improvements 13.1.4 Sep 17 Updated for iOS/iPadOS 27 13.1.3 Sep 15 Adds another legacy app for eligibility for perpetual license discounts. 13.1.2 Sep 10 Corrected an issue that could prevent verification of a SoundMeter Pro 2020 or 2022 app registration (to qualify for discounts on a SoundMeter Pro 2026 perpetual license). 13.1.1 Sep 2 - Support for miniDSP EARS Pro headphone test fixture. Factory-supplied microphone sensitivity will automatically be downloaded and applied the first time the EARS Pro audio interface is recognized by SoundMeter. This requires that the EARS Pro analog jig is used along with the optional EARS Pro 2x2 USB audio interface.
- Corrected a potential glitch in Octave Analyzer measurements with Z weighting and data logging enabled.
- Minor cosmetic improvements. 13.1 Aug 11 Updated the documentation to include references to the MultiTool. 13.0.4 Jul 7 Fixed a minor issue with the in-app store. 13.0.3 Jul 4 - A perpetual license for SoundMeter Pro 2026 is now offered alongside the Pro subscriptions. The in-app store has been re-designed to offer both subscriptions and perpetual licenses using the latest UI and StoreKit frameworks from Apple.
- The MultiTool is now available in SoundMeter X with a Pro license (perpetual or subscription). The MultiTool allows multiple of SoundMeter’s other tools to be operated simultaneously and for custom configurations to be saved and retrieved.
- SoundMeter X’s user interface has been updated to support the new liquid glass appearance on iOS and iPadOS 26.
- Faber Account access has been added to SoundMeter X to check eligibility for a discount on the Pro 2026 perpetual license. Creating or signing in to a Faber Account is optional.
- The tab view has been removed from SignalScope X on iPhone and iPad and replaced with a tool sidebar menu. Now, to switch tools, tap on the toolbox icon in the top toolbar to open the tool menu and then tap on the name of the desired tool. On iPad, the tool menu can be kept visible or hidden, as desired. 13.0.2 Jul 1 - The IO Device Configuration menu now includes a Soft Gain option in the output options section. The software gain is a digital scale factor applied to all output signals just before they are sent to the hardware. The intent of this is to support listening to low level signals (play-through or internally-generated) in potentially noisy environments.
- Fixed some cosmetic issues. 12.6 10/30/2024 - SoundMeter's companion app for Apple Watch has been completely re-written for better performance and improved support for newer versions of watchOS. (Note that the watch app remains a remote for the iPhone app--it does not perform any kind of sound measurements using the watch's built-in microphone.)
- The watch app now includes a remote for the Max Levels tool.
- In the watch app, the Meter tool now displays max and peak sound levels.
- Improved handling of data and audio files. On newer versions of iOS, external files (e.g. on iCloud Drive) can be opened in-place instead of being copied into the app sandbox before opening.
- Significant improvements have been made 'under the hood' to ensure that the app runs well on the newest operating systems.
- Other minor cosmetic and stability improvements. 12.5 08/13/2024 - Support added for Dayton iMM-6C measurement microphone, including automatic retrieval of calibration information after entering the product serial number.
- Other cosmetic and stability improvements. 12.3.2 04/11/2024 - Help files now adjust to dark mode.
- The Recorder tool no longer reports a problem when audio file metadata is successfully saved in the file.
- Support for the miniDSP UMIK-2 and the Dayton UMM-6 USB measurement microphones has been improved.
- The built-in web server has improved handling of data files that have non-ascii characters in their name.
- Other cosmetic and stability improvements. 12.0.12 06/09/2023 - Fixed a cosmetic bug in the Signal Generator on iPhone. 12.0.7 11/04/2022 - New Pro feature: When saving an audio or data file, up to 10 custom metadata entries, each consisting of a name and value, can be specified to be included in the file. Each custom metadata entry is remembered by the app until it is manually removed. Custom metadata entries can be enabled or disabled for inclusion in saved data files.
- The Signal Generator tool now supports multiple output channel selection for the left and right signals.
- New color scheme: Gray.
- In the Octave tool, data import has moved from the options menu to a new menu of its own, which is found next to the input channel selection menu.
- Expanded list of vertical scale selections. Selection can now be made from a list of available scales in the Display Options menu.
- Under the hood improvements: Performance and robustness of the underlying software code have been enhanced in many areas of the app.
- Cosmetic improvements can be found throughout the app. 12.0.5 10/22/2022 - It is now possible to select loaded data for cursor peak track and horizontal cursor bar in the Octave tool.
- Fixed a bug with the cursor horizontal bar and peak track selection menus.
- Minor bug fixes and performance enhancements. 11.5.6 02/15/2022 - A list of the most recent articles and news items on the Faber Blog is now accessible from the Info menu.
- Minor bug fixes. 11.5.5 12/29/2021 - Corrected an error in assigning the default microphone and headset sensitivity to older iPad models. 11.5.4 12/16/2021 - Updated support for new M1 iPad Pro models.
- Added a correction factor, based on sample rate, for The Modal Shop's 485B39 USB ICP signal conditioner.
- Additional bug fixes and cosmetic/user experience improvements. 11.5.3 12/15/2021 - Improved support for audio interfaces with DC-coupled inputs, including an optional DC blocking filter per input channel.
- Enhanced real-time audio processing for better performance and better measurements at higher sample rates.
- Additional bug fixes and cosmetic/user experience improvements. 11.4 08/04/2021 - Direct support for miniDSP UMIK-2: Enter the serial number of your UMIK-2 to have the factory-supplied sensitivity automatically downloaded and applied for accurate measurements. Changing the input gain automatically updates the sensitivity to preserve the calibration.
- Flat frequency weighting is now labeled as Z weighting.
- Minor bug fixes and cosmetic improvements. 11.3 05/27/2021 - Built for iOS 14.
- Nominal microphone sensitivities updated to include new iPad Air, iPhone 12, and iPhone 12 Pro.
- Minor bug fixes and cosmetic improvements. 11.1 01/08/2021 - Keyboard shortcuts make it easier to operate SoundMeter X on iPhones or iPads running iOS 13.
- Local file names can be edited within the file detail view.
- Additional vertical scale options have been added (24 and 30 dB/division).
- The Signal Generator shuts down gracefully (no pops) when the tool is stopped.
- iOS 12 or later is required to run SoundMeter X version 11.
- Bug fixes and cosmetic enhancements. 11.0 09/02/2020 - Fixed the link for the Manage Subscriptions button.
- Minor bug fixes and cosmetic improvements. 10.5.5 05/23/2020 - The features of the SoundMeter Basic subscription are now permanently unlocked for free!
- The Peak Track setting in the Octave tool is properly recalled when the app is re-launched.
- Minor bug fixes and cosmetic improvements. 10.5.4 04/15/2020