Listen, Inc. Releases SoundCheck 18 & Supplies a Test Sequence that Applies the Harman Target Curve for IEMs

Use the Harman Target Curve test sequence & SoundCheck 18 to yield the predicted user preference for the device under test.

This article is Authorized by the In-Ear Monitor International Trade Organziation

This is a new announcement from one of our founding members. Our members are always pushing the boundaries of what is sonically possible for in-ear monitoring.

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March 13, 2020

SoundCheck 18, the latest release of Listen, Inc.’s flagship audio test and measurement system, contains many new features focused on automation and simplicity. Some of these are specifically designed for large-scale integration in factory environments, while others are designed to accelerate R&D testing, particularly where multiple channels are required and/or voice-activated devices are being tested.

Test configuration data, such as limits, test levels, and test signals, can now be passed into SoundCheck from external programs using TCP/IP commands. By externally storing parameters, a single sequence can be used for multiple products, simplifying the number of sequences that a large organi­zation needs to maintain, and reducing test configuration time. This functionality is also useful for applications where a sequence needs to be run many times with different parameters, for example, testing voice recognition with a range of voices or test levels, or where SoundCheck tests are run as part of a larger automated test framework controlled using Python, C#, Visual Basic, LabVIEW, etc.

Setup time is reduced with true plug’n’play hardware configuration. Listen and Portland Tool & Die interfaces are simply connected via the USB cable, and the software automatically creates input and output signal paths and populates parameters such as sampling rate and calibration values. Furthermore, when substituting devices of the same type, SoundCheck will re-use the configuration pre­viously set up, either manually or during a sequence, so that signal paths and sequence configurations do not need to be updated. This offers significant time-savings when deploying a sequence over multiple stations accelerating set-up time for large-scale operations. New TEDS Support (with compatible Listen hardware) enables automatic identification, configuration and calibration of TEDS microphones and accelerometers, also saving time on initial hardware setup or whenever hardware is changed.

The development and optimization of test sequences has been simplified with improvements to gain control selection. Similarly, sampling rate management has been streamlined with automatic latency rate adjustment for devices where latency varies with sampling rate, and the ability to set sampling rate in the stimulus editor. Sampling rate when using WAV files is also now automatically adjusted, making it simpler to make measurement with wave file signals such as speech or music.

For MEMS microphone tests, the Portland Tool & Die MEMS interfaces can now be controlled from within SoundCheck for faster setup as well as greater measurement reliability as the device settings can be built into the test sequence. Se­quences using the R&D grade DCC-1448 interface will also work seamlessly with the production-grade PQC-1448, making it much simpler to transition sequences from the R&D lab to the produc­tion line.

Additional new features include WASAPI driver support for improved multichannel capabilities, and enhanced digital I/O control for easy conversion of sequences between hardware options.

Previous Harman Target Curve test sequences still work with SoundCheck 18. For more information and to download the sequence, please visit: Prediction of Listener Preference of In-Ear Headphones using the Harman Model

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