Faber Acoustical brings room acoustics to iOS with RoomScope

Faber Acoustical is pleased to announce the immediate availability of RoomScope for iOS on the App Store.

RoomScope both measures and analyzes room impulse responses, calculating acoustical parameters such as reverberation time, early decay time, clarity and definition. Room acoustics parameters may even be calculated and displayed in whole or 1/3 octave frequency bands.

RoomScope offers users the ability to measure the acoustic response of a room, while viewing the impulse response, frequency response, or coherence dynamically as the measurement progresses. RoomScope’s dual-channel measurement capability enables users to employ built-in frequency sweeps or pseudorandom noise as a reference, or to work with arbitrary test signals from another source.

Room parameters, which are calculated by RoomScope using the integrated impulse response method of the ISO 3382 standard, include reverberation time (T20, T30, T60), early decay time, clarity (C50, C80, Cte), and definition (D50, D80, Dte). Users can use dual cursors within the plot of the squared impulse response to dynamically set integration limits for the decay curve.

Measurement data and calculated acoustic parameters may be exported to CSV, TXT, or MAT files. Impulse response data may also be stored in AIF, CAF, or WAV audio files. RoomScope additionally supports loading impulse response data via audio files created or opened in other apps, such as SignalScope Pro.

Download RoomScope

iPhone 5 screenshots

RoomScope Impulse Response iPhone5RoomScope Decay Curve iPhone5

 

iPad screenshots

RoomScope Impulse Response iPadRoomScope Decay Curve iPad

 

 

Are you looking for a measurement microphone for your iPhone?

Since iOS 6 finally remedied the low frequency roll-off problem of the headset mic input of the iPhone, iPod touch, and iPad, the headset jack has become a suitable option for measurement microphone input. Prior to the release of iOS 6, the only way to connect an external measurement microphone, without sacrificing low-frequency information, was to go through the dock connector. Dock connector devices can still provide higher quality solutions, but working with the headset jack offers a level of portability (i.e. compact size) that cannot be matched when a 30-pin dock connector is involved (we’ll see what comes along to take advantage of the new Lightning connector).

MicW i436

Some time ago, I was made aware of the i436 measurement microphone from MicW. It looked like exactly what was needed to turn any iOS device into a quality sound level meter, or acoustical analysis tool, that you could truly carry around in your pocket. However, it was limited in its utility by that pesky low-end roll-off that plagued earlier versions of iOS. Some developers attempted to perform software correction for the input filters, but when an input signal is driven into the noise floor by the hardware (or firmware), there’s nothing app software can do to restore the lost signal at those lower frequencies. Now that iOS 6 has solved the issue, the i436 has become the attractive measurement microphone solution for iOS that it should have been when it was first introduced.

i436i436

Last weekend, I carried the i436 around the Denver Tech Center Marriott at the Rocky Mountain Audio Fest (RMAF), along with my iPhone 5. The i436 is small enough that it could slip into my pocket and remain there unnoticed or it could stay connected to the iPhone, which was perched in my shirt pocket when it wasn’t in my hand. In short, I was quite pleased to confirm that the i436 does indeed make for a portable measurement solution that you can carry in your pocket all day long.

MicW i436 Noise Measurement

As for quality, the i436 looks and feels like a proper measurement microphone. It was designed to meet the Class 2 standard for sound level meters, which addresses issues like environmental stability in addition to frequency response. The i436 also fits a standard microphone field calibrator, with a 1/4″ adapter, which you would also expect from a measurement microphone. A field calibrator makes microphone sensitivity calibration very easy with measurement software like SoundMeter or SignalScope Pro.

i436 Typical Frequency Responsei436 Typical Polar Pattern

The i436 is available in a package with just the mic, or in a kit. The kit includes a wind screen, extension cable, splitter cable (to connect headphones or an audio cable to the headphone output), a small clip, and an aluminum storage tube that doubles as a holder for the i436 that mounts to the top of a standard microphone stand (very handy).

i436 Single Packagei436 Kit Package

If Class 2 compliance meets your needs, then I highly recommend the MicW i436, especially in the kit. Either option is quite affordable for a quality measurement microphone. If you need a microphone that conforms to the Class 1 standard, then another hardware solution will be necessary.

Finally! iOS 6 kills the filter on headset and mic inputs!

So, iOS 6 has finally arrived and the biggest news for SoundMeter, SignalScope, and SignalScope Pro users may just be that the high-pass filter which used to plague the built-in microphone and headset microphone inputs now gets bypassed. This exciting improvement to iOS 6 will significantly improve the quality of acoustical measurements that can be made with the iPhone, iPad, or iPod touch, without requiring a dock connector accessory for audio input.

Below are 1/3-octave headset input frequency response comparisons for the various iOS devices that support iOS 6. More details regarding the headset input and built-in microphone will be presented in the days ahead.

Update (9/19/20120, 7:32 PM): It should be noted that these are electrical frequency response measurements. When making acoustical measurements, the overall frequency response will depend also on the microphone that is used.

iPhone 4S Before iOS 6/Now

iPhone 4S Headset Leq Pre-iOS 6  iPhone 4S Headset Leq iOS 6

iPhone 4 Before iOS 6/Now

iPhone 4 Headset Leq Pre-iOS 6  iPhone 4 Headset Leq iOS 6

iPhone 3GS Before iOS 6/Now

iPhone 3GS Headset Leq Pre-iOS 6  iPhone 3GS Headset Leq iOS 6

iPod touch 4 Before iOS 6/Now

iPod touch 4 Headset Leq Pre-iOS 6  iPod touch 4 Headset Leq iOS 6

iPad 3 Before iOS 6/Now

iPad 3 Headset Leq Pre-iOS 6  iPad 3 Headset Leq iOS 6

iPad 2 Before iOS 6/Now

iPad 2 Headset Leq Pre-iOS 6  iPad 2 Headset Leq iOS 6

 

iOS 6 is now highly recommended for all SoundMeter, SignalScope, and SignalScope Pro users.

 

 

SignalScope Pro’s (iOS) Oscope tool now exports waveform data to audio files

As of version 2.3, the Oscope tool in SignalScope Pro for iOS can export waveform data to AIF, CAF, or WAV audio files. On iOS 5, or later, audio files can be previewed within SignalScope Pro or opened with other apps on the same device that support these file formats. Audio files may also be transferred to a Mac or PC via iTunes File Sharing, or downloaded with a web browser via the built-in HTTP file server.

SignalScope Pro Audio File Export     SignalScope Pro Audio File Name

Audio file export is also included with the DAQ Upgrade available via in-app purchase in SoundMeter 3.1 and SignalScope 3.3. In SoundMeter, the Oscope tool in-app upgrade is also required. SoundMeter 3.1, SignalScope 3.3 and SignalScope Pro 2.3 are all available for immediate download on the App Store.

Additional changes to these apps include:

  • The Signal Generator tab now supports the same color schemes as the analysis tools.
  • Other cosmetic improvements have been made to the user interface.
  • Several bugs have been fixed.

IOScope 2.1 exports impulse responses to AIF, CAF, or WAV audio files

IOScope 2.1 is now available for download on the App Store.

IOScope room impulse response measurement

IOScope room impulse response measurement

IOScope 2 can now export normalized impulse response data to AIF, CAF, or WAV audio files. On iOS 5, or later, audio files can be previewed with IOScope or opened with other apps on the same device that can open these file formats. Of course, IOScope also allows for audio files to be transferred to a Mac or PC via iTunes File Sharing, or downloaded with a web browser via the built-in HTTP file server.

With IOScope, measure loudspeaker impedance, frequency response, and sensitivity. Measure a room impulse response. Tune a large sound reinforcement system, time-align a set of surround sound speakers, or optimize your home stereo. Determine the actual cutoff frequencies of your latest speaker crossover circuit, or teach your students the fundamentals of Fourier analysis of dynamic systems.

Measure frequency response magnitude and phase, coherence, and group delay. Time domain functions enable you to measure impulse response and auto/cross-correlation. IOScope includes a built-in signal generator for producing suitable excitation signals to analyze your system or device under test (DUT). The reference signal can be taken from the internal signal generator or from an external source (when using an external reference, a stereo audio input device, connected to the dock connector, is required).

IOScope also turns your iOS device into a platform for data acquisition, storing acquired data in CSV or tab-delimited text files, MAT-files, or images, including high-resolution PDF files, for later retrieval from your device.

What’s new in version 2.1?

  • Impulse responses can now be exported to AIFF, CAF, or WAV audio files. On iOS 5, audio files can be previewed within IOScope, or opened in other apps that support these file formats.
  • Frequency and time domain data can now be exported to CSV files, in addition to MAT-files and tab-delimited text files. CSV files can be opened directly in Numbers, or other spreadsheet apps that support it, from within IOScope.
  • The Excitation (signal generator) tab now supports the same color schemes as the analysis tools.
  • Other cosmetic improvements have been made to the user interface.

IOScope 2.1 requires iOS 4 or later, and is now available for download on the App Store for $74.99 (USD) in the Utilities category.

Learn more or download IOScope on the App Store

IOScope audio file export

IOScope audio file export

Stereo 1/3-octave analysis now available in SignalScope Pro

With the release of version 2.2, the Octave tool in SignalScope Pro for iOS can now analyze two input channels simultaneously. This new capability is only available on devices running iOS 5 or later, and it requires a stereo or two-channel dock connector audio accessory.

     

The Octave tool offers whole and 1/3-octave real-time spectral analysis with A, C, or flat frequency weighting and fast, slow, or impulse time weighting. Time exponential averaged level (Lp) and equivalent level (Leq) measurements are both supported.

The Octave tool available via in-app purchase in SoundMeter 3.0 and SignalScope 3.2 also offers two-channel measurement capability on iOS 5 or later. SoundMeter 3.0, SignalScope 3.2 and SignalScope Pro 2.2 are all available for immediate download on the App Store.

Improvements in SignalScope 3.2 and SignalScope Pro 2.2 include:

  • For users running iOS 5, or later, the Octave analyzer tool can now be operated as a stereo RTA, analyzing two input channels simultaneously (with compatible input hardware). (The Octave tool is available within SignalScope via in-app purchase.)
  • Data can now be exported to CSV files from the FFT, Octave, and Oscope tools. CSV files can be opened directly in Numbers, or other spreadsheet apps that support it, from within SignalScope. Tab-delimited text files can still be created by giving the file name a .txt extension. (Data file export requires the data acquisition upgrade available within SignalScope via in-app purchase.)
  • Corrects a potential crash when accessing the image picker on iPad.
  • SignalScope uses less memory on iPhone and iPod touch.
  • Twitter support has been restored (in iOS 5) for tweeting level meter data. (The Level Meter tool is available within SignalScope via in-app purchase.)

SoundMeter 3.0 offers in-app upgrades

  SoundMeter 3.0 is now available for download on the App Store,

offering in-app purchases of the same tools found in SignalScope Pro. Available upgrades include dual-channel Octave RTA, Oscilloscope, and FFT Analyzer tools, as well as a data acquisition upgrade.

Dual-channel analysis in the Octave tool enables SoundMeter to be used as a stereo 1/3-octave RTA. This dual-channel capability requires iOS 5, and is also coming soon to the Octave tool in SignalScope and SignalScope Pro, but it is available now in SoundMeter. (In SignalScope, the Octave tool is also available via in-app purchase.)

SoundMeter’s new data acquisition upgrade enables the user to export Octave, Oscope, and FFT data to CSV, tab-delimited text, and MAT files, and to access those files from a web browser on another device. This upgrade also enables additional units, such as V, A, g, and ips to be assigned to input signals.

Download SoundMeter 2

dB 2.0 comes to the iPad

  dB 2.0 is available for download on the App Store with the following additions:

– dB now runs natively on iPad, as well as on iPhone and iPod touch devices.

– Three color schemes are supported, offering black, blue, and white background colors.

– Twitter support has been restored (requires iOS 5 or later).

iOS 5 enables iOS devices to measure sound levels up to 120 dB with the built-in microphone and 130 dB with the headset microphone. This is now supported.

– Default input sensitivities are now managed for each iOS device.

– iPhone and iPad retina display resolutions are now fully supported.

IOScope 2 adds native support for iPad and new, lower price

IOScope 2.0 is now available for download on the App Store.

IOScope room impulse response measurement

IOScope room impulse response measurement

IOScope 2 comes with a new, lower price and offers some of the same new features which were recently added to SignalScope, SignalScope Pro and SoundMeter for iOS.

With IOScope, measure loudspeaker impedance, frequency response, and sensitivity. Measure a room impulse response. Tune a large sound reinforcement system, time-align a set of surround sound speakers, or optimize your home stereo. Determine the actual cutoff frequencies of your latest speaker crossover circuit, or teach your students the fundamentals of Fourier analysis of dynamic systems.

Measure frequency response magnitude and phase, coherence, and group delay. Time domain functions enable you to measure impulse response and auto/cross-correlation. IOScope includes a built-in signal generator for producing suitable excitation signals to analyze your system or device under test (DUT). The reference signal can be taken from the internal signal generator or from an external source (when using an external reference, a stereo audio input device, connected to the dock connector, is required).

IOScope also turns your iOS device into a platform for data acquisition, storing acquired data in tab-delimited text files, MAT-files, or images, including high-resolution PDF files, for later retrieval from your device.

What’s new in version 2.0?

  • IOScope now runs natively on iPad, as well as on iPhone and iPod touch devices.
  • iPad retina display resolution is fully supported.
  • Analyzer plots can be saved to PDF files in addition to jpeg image files.
  • Data files are accessible via iTunes file sharing, in addition to the app’s built-in web server.
  • Data files, including text and PDF files, can be previewed or printed within the app or optionally opened in another compatible app.
  • Three color schemes are supported, offering black, blue, and white background colors (white may be preferred for printing results stored in PDF or jpeg images).
  • In landscape orientation, the new full-screen mode hides the toolbar and tab bar to maximize the size of the analyzer displays.
  • IOScope offers enhanced support for audio accessories, connected via the 30-pin dock connector.
  • Input gain adjustment is available for any audio input hardware that supports it.
  • Software-selectable options for the GuitarJack and GuitarJack model 2, from Sonoma Wire Works, may be adjusted directly from within IOScope.
  • IOScope now supports multi-channel USB audio devices, connected to any iPad model via the iPad Camera Connection Kit.
  • External displays are supported on iPad (up to 1920×1200 resolution on iPad 2 or 3; up to 720p on the original iPad). External display resolution is dependent on the screen resolution as well as the video output adapter connected to the iOS device.

IOScope 2.0 requires iOS 4 or later, and is now available for download on the App Store for $74.99 (USD) in the Utilities category.

Learn more or download IOScope on the App Store

IOScope impedance measurement

IOScope impedance measurement

SignalScope Pro and friends offer enhanced iOS hardware support

SignalScope Pro 2.1, SignalScope 3.1, and SoundMeter 2.1, which are now available for download on the app store, feature better support for audio input hardware, including direct interaction with GuitarJack (models 1 and 2) from Sonoma Wire Works.

  • Each app offers enhanced support for audio accessories, connected via the 30-pin dock connector.
  • Input gain adjustment is available for any audio input hardware that supports it.
  • Software-selectable options for the GuitarJack and GuitarJack model 2, from Sonoma Wire Works, may be adjusted directly from within each app.
  • Each app now supports multi-channel USB audio devices, connected to any iPad model via the iPad Camera Connection Kit.
  • Default input sensitivities are now managed for each iOS device.
  • iPad retina display resolution is now fully supported.
  • SignalScope and SoundMeter also now support viewing saved PDF images within the app, in addition to retrieving them via iTunes File Sharing on a Mac or PC.

 

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