Like the recently released SignalScope Pro 4, SoundMeter Pro 2.0 can now uniquely identify USB audio devices attached to an iOS device and remember your settings for each audio device each time it is connected. Additionally, version 2 includes direct support for the miniDSP UMIK-1 USB measurement microphone. Sensitivity calibration and frequency response data for the UMIK-1 can be downloaded automatically, just by entering the UMIK-1’s serial number. Making calibrated sound level measurements is as easy as plugging in the UMIK-1 and typing in its serial number (the serial number only needs to be entered once, after which SoundMeter Pro will remember the microphone sensitivity).
SoundMeter Pro 2 supports manually switching between available audio inputs and outputs (i.e. if a headset microphone is connected, as well as a USB microphone, SoundMeter Pro allows you to manually switch between the built-in microphone, the headset microphone, and the USB microphone in the software without connecting or disconnecting any hardware). SoundMeter Pro 2 also supports manually switching between available microphones on devices, such as iPhones and some iPads, that have more than one built-in microphone.
Also new in SoundMeter Pro 2.0:
– Nominal input sensitivities have been updated for built-in microphones and headset inputs on iOS 8.
– On iOS 8, low, mid, and high input gain settings are available on all supported devices, for built-in microphones and headset input. Each gain setting now has an associated nominal input sensitivity. User calibrations are saved independently for each gain setting.
– A text formatting issue in MAT-file export has been corrected.
– Minor bug fixes and cosmetic enhancements.
– Apple’s Lightning to USB Camera Adapter or iPad Camera Connection Kit is required for connecting USB Audio devices to your iPhone, iPod touch, or iPad.
- SoundMeter Pro 2 requires iOS 7 or later.
Similar features have been added to SoundMeter 6.0, although select in-app upgrades may be required (available via in-app purchase).
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SignalScope Pro version 4 can uniquely identify USB audio devices attached to iPhone, iPod touch, or iPad, and remember user settings for each device the next time it is connected. Direct support has been added for The Modal Shop’s model 333D01 USB digital accelerometer and miniDSP’s UMIK-1 USB measurement microphone. With the 333D01, SignalScope Pro automatically loads serial number and sensitivity calibration information directly from the device as soon as it is connected. When the UMIK-1 is connected, SignalScope Pro recognizes it and prompts the user for its serial number. Sensitivity calibration and frequency response data for the UMIK-1 can then be downloaded automatically, just by entering the UMIK-1’s serial number.
Another major new feature in version 4 is SignalScope Pro’s ability to load microphone frequency response data (FRD) and apply frequency response correction (FRC) to FFT spectrum measurements. FRD can be loaded for any input channel, for any kind of transducer (i.e. it’s not just for microphones). Sophisticated interpolation techniques are employed to generate a smooth frequency response
correction curve that matches the loaded data. This correction curve can then be applied to an FFT spectrum
of arbitrary length or frequency resolution.
Also new in version 4:
- SignalScope Pro directly supports The Modal Shop’s model 333D01 USB digital accelerometer, and can automatically load serial number and sensitivity calibration information directly from the device. Making calibrated acceleration measurements is as easy as plugging in the 333D01. Factory calibration information is embedded in exported audio files (from the Oscope tool) when data is acquired with the 333D01.
- SignalScope Pro directly supports the miniDSP UMIK-1 USB measurement microphone. Sensitivity calibration and frequency response data for the UMIK-1 can be downloaded automatically, just by entering the UMIK-1’s serial number. Making calibrated sound level measurements is as easy as plugging in the UMIK-1 and typing in its serial number (the serial number only needs to be entered once, after which SignalScope Pro will remember the microphone sensitivity).
- Additional dB scales of 3, 6, 12, 15, and 18 dB per div are now supported by the FFT analyzer. Also, when adjusting the dB scale manually, the dB offset will always be set as a multiple of the scale so that 0 dB is always available in the vertical axis labels.
- Minor bug fixes and cosmetic enhancements.
- Apple’s Lightning to USB Camera Adapter or iPad Camera Connection Kit is required for connecting USB Audio devices to your iPhone, iPod touch, or iPad.
- SignalScope Pro 4 requires iOS 7 or later.
Similar features have been added to SignalScope 5.0, although select in-app upgrades may be required (available via in-app purchase).
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Last year, researchers at NIOSH (the National Institute for Occupational Safety and Health) began looking at mobile sound level meter apps, hoping to find that such apps could be suitable for occupational noise measurements. After defining specific criteria to qualify sound level meter apps as suitable for their tests, they set out to find matching apps for iOS, Android, and Windows-based mobile devices. Ten iOS apps, out of over 130 available, were examined as part of their research. Of 62 Android apps downloaded for examination, only 4 apps partially met their criteria. No Windows-based apps qualified.
The results of the study were recently published in the (peer-reviewed) Journal of the Acoustical Society of America (JASA). According to the published article, “The evidence suggests that for A-weighted data, SoundMeter is the app best suited for occupational and general purpose noise measurements. In addition to having the smallest mean difference for the A-weighted data, SoundMeter had the narrowest distribution of differences…”
The article concludes, “This study showed that certain sound measurement apps for Apple smartphones and tablets may be considered accurate and reliable to be used to assess occupational noise exposures. Android and Windows developers do not offer apps that meet the functionality needed for occupational noise assessments.”
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Noted at the end of the article: “The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the National Institute for Occupational Safety and Health. Mention of any company or product does not constitute endorsement by NIOSH.”
NIOSH Blog Article (with images and video)
Building on the success of SoundMeter, which debuted on the iPhone App Store in August of 2008, Faber Acoustical has announced the release of SoundMeter Pro. SoundMeter Pro turns your iPad, iPhone, or iPod touch into a handheld data-logging sound level meter (SLM), data-logging noise dosimeter, and real-time analyzer (RTA).
SoundMeter Pro works with built-in or external measurement microphones to deliver reliable sound level measurements, including time-weighted and equivalent sound levels in addition to percentile-exceeded sound levels and noise dose. Measured levels can be logged at intervals as small as 0.1 seconds for durations of up to two weeks (longer measurement durations may require larger logging intervals). The built-in Octave tool performs sound level measurements in whole or 1/3-octave frequency bands.
In a recent article published in the Journal of the Acoustical Society of America, NIOSH researchers found that, out of over 130 sound measurement apps for iOS, “SoundMeter is the app best suited for occupational and general purpose noise measurements.” SoundMeter Pro builds on everything SoundMeter has to offer.
With the built-in or headset microphone, SoundMeter Pro can measure peak sound levels of up to approximately 130 dB. Results may vary between iOS devices and headset microphones. External microphones may enable the measurement of much higher sound levels.
SoundMeter Pro also includes various features that users have come to expect from Faber apps, including the ability to save measurement data to CSV, TXT, or MAT files, save measurement displays to high resolution PDF files, switch between three different color schemes, and calibrate microphone input sensitivity. Exported data files may be retrieved from the iOS device via iTunes File Sharing or by enabling the app’s built-in file server and downloading the files to another device or computer via a standard web browser. The built-in signal generator tool further extends SoundMeter Pro’s utility by producing any of various test signals, including white noise, pink noise, frequency sweeps, and periodic waveforms.
Faber Acoustical has simultaneously announced the availability of SoundMeter 5.0. The new version of SoundMeter adds support for a new Data Logging Upgrade, which is available via in-app purchase. SoundMeter Pro includes all the functionality of SoundMeter 5 with all its available in-app purchase upgrades. Although both apps run on iOS 6, each also features a user interface tailored for iOS 7.
NOTE: Although it has been designed to do so, SoundMeter Pro is not guaranteed to meet ANSI or IEC standards for sound level meters. These standards require conformance of the entire measurement system, including software, hardware and microphones.
The built-in and headset microphones are suitable for certain, basic sound level measurements, but high precision external microphones may also be used with appropriate audio accessory hardware. Even though default sensitivity values are included for the built-in and headset microphones, for best results, SoundMeter Pro should be calibrated before use. Sound levels may be off by a few dB when using the default microphone sensitivity.
* iOS 6.0 or later
* iPhone, iPod touch, or iPad
* 4.12 MB
Pricing and Availability:
SoundMeter Pro is now available for download on the App Store for $99.99 (USD). External hardware may be required for analog input capability. More information on SoundMeter Pro can be found at Faber Acoustical online. More information regarding suitable input devices for specific iOS devices can be found on the Faber Acoustical blog.
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Download SoundMeter 5.0
In version 2.1, RoomScope now presents a nonlinearity parameter to offer additional guidance on the validity of each acoustic decay parameter (T20, T30, T60, EDT). Values of greater than 10 ‰ (per mille, or parts per thousand) indicate that the estimated reverberation or decay time may be suspect, or that integration limits may need to be adjusted manually to obtain a more accurate result.
RoomScope 2.1 is now available for download on the App Store.
Download RoomScope 2.1
Version 3.5 of Electroacoustics Toolbox extends AppleScript support to the Room Analyzer tool (sold separately). -> read more …
SoundMeter 4.1 offers percentile-exceeded sound levels (Lx) via in-app purchase. -> read more …
RoomScope version 2.0 now fully supports iOS 7 with a refreshed look and feel that is consistent with recent updates to SignalScope Pro and IOScope. -> read more …
USB audio devices can now be used with iPhones that support iOS 7 as well as the 5th generation iPod touch. -> read more …
All Faber apps for Mac have been updated to make more efficient use of resources. -> read more …