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.

iPhone 5 audio consistent with iPhone 4S

Today, I had the opportunity to begin testing the audio input characteristics of the new iPhone 5. As seen in the plots, below, the headset input frequency response matches that of the iPhone 4S, which was presented in the previous post. The behavior of the built-in microphone also seems to match that of the iPhone 4S, suggesting that Apple kept the audio input path essentially unchanged in the new device.

One current limitation of the iPhone 5 is that existing dock connector accessories for audio input (and output) are not compatible, due to the iPhone’s new Lightning connector. As soon as Apple’s new Lightning to 30-pin adapter arrives, we’ll be able to see if it enables existing audio accessories to work with the new iPhone. Until then, the headset input and built-in microphone will have to suffice for iPhone 5 users. Fortunately, iOS 6, which comes installed on the iPhone 5, allows us to bypass automatic gain control and the high pass filter that plagued the headset input and built-in mic in earlier versions of iOS.

iPhone 5 Headset Leq iOS 6

iPhone 5 Headset Leq iOS 6 Fine Scale

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.

 

 

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

SoundMeter 2.0 is on the App Store

As in recent updates to SignalScope and SignalScope Pro, SoundMeter now runs natively on iPad, as well as iPhone and iPod touch.

SoundMeter now supports drawing on an external screen with a compatible video output adapter. The original iPad supports external screen resolutions up to 720p and the iPad 2 supports resolutions as high as 1080p and even 1920×1200 with compatible hardware. Video output support is not supported on iPhone or iPod touch.

SoundMeter also supports saving the sound level display to PDF files, which can be accessed via iTunes File Sharing on a Mac or PC. The same black, blue, and white color schemes as found in SignalScope Pro 2 are also supported in SoundMeter 2.

Download SoundMeter 2

SoundMeter 2.0 Screenshot

SignalScope 3 and SignalSuite 4 Complete Mac App Store Transition

Both SignalScope 3.0 and SignalSuite 4.0 became available for download on the Mac App Store, today. The availability of these two apps marks the successful transition of all of Faber Acoustical’s Mac apps to the new App Store. Both apps feature an improved user interface and require Mac OS X, version 10.6. Use of the Mac App Store requires at least Mac OS 10.6.6.

SignalScope 3 builds on SignalScope’s tradition of award-winning design and precision measurement capabilities by building on advanced technology developed for Faber Acoustical’s flagship product, Electroacoustics Toolbox.

SignalScope is a modularized, multi-channel dynamic signal analyzer and data acquisition platform for Mac. It brings powerful tools to the Macintosh platform for multi-channel, audio-band data acquisition and real-time analysis of electrical, acoustical, and electroacoustic signals and systems. The software is designed to work with any Mac-compatible audio hardware and supports multiple channels of 8, 16, 24, or 32-bit data with sample rates as high as the hardware will support.

New functionality in SignalScope includes the option to perform arithmetic operations, such as addition, subtraction, and multiplication, on two arbitrary input channels of an audio input device. Users can also specify arbitrary FFT lengths and view live spectrogram data with a logarithmic frequency scale. Two of each type of analysis tool can be opened and operated simultaneously.

Learn more about SignalScope 3.0

Download SignalScope from the Mac App Store

Download SignalScope Trial from FaberAcoustical.com

Version 4 continues SignalSuite’s tradition of offering tremendous flexibility in an audio test signal generator. The new version adds support for up to two stereo signal generators to be operated simultaneously.

Audio Unit generator support opens up endless possibilities for additional signal types. This includes signals stored in standard audio files, which can be now played within SignalSuite by using the AUAudioFilePlayer plug-in included with Mac OS X. It also opens up the option to play back signals sent across a network from another computer, via the AUNetSend/AUNetReceive plug-ins, which are also included with Mac OS X.

Learn more about SignalSuite 4.0

Download SignalSuite from the Mac App Store

Download SignalSuite Trial from FaberAcoustical.com

 

SignalScope Pro 3.0 is in the Mac App Store

SignalScope Pro 3.0 for Mac OS 10.6 is now available for download on the Mac App Store.

Faber Acoustical has announced the release of SignalScope Pro 3.0. The latest release of Faber Acoustical’s most popular acoustical test and measurement toolset for Mac is now available for purchase in the Mac App Store. Version 3 of SignalScope Pro features an enhanced user interface, better control over audio device configurations, and more comprehensive user preferences.

SignalScope Pro offers a suite of tools on the Mac for dynamic and real-time signal analysis, data acquisition, and automated testing. SignalScope Pro was designed for researchers, educators, consultants, and advanced hobbyists. Despite its power and flexibility, SignalScope Pro provides an intuitive user interface that enables even complex measurements to be configured within a few minutes. Those measurement configurations can then be saved and reloaded when the need arises.

 

New functionality in SignalScope Pro includes the option to perform arithmetic operations, such as addition, subtraction, and multiplication, on two arbitrary input channels of an audio input device. Users can also specify arbitrary FFT lengths and view live spectrogram data in 3D with a logarithmic frequency scale. Two of each type of analysis tool can be opened and operated simultaneously.

Minimum Requirements:
* Intel-based Mac
* Requires Mac OS 10.6 or later

Pricing and Availability:
SignalScope Pro 3.0 is now available for download on the Mac App Store for $199.99 (USD) in the Utilities category. Those who wish to try SignalScope Pro before they buy are welcome to download a free 30-day trial. SignalScope Pro 2 users can upgrade to version 3 for $99 at our online store.

Learn more about SignalScope Pro 3.0

Download SignalScope Pro from the Mac App Store

Download SignalScope Pro 3 trial

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