Skip to content

Perceptual hum and rub function added to Listen’s SoundCheck 20 software

A new perceptual distortion algorithm for end-of-line testing has been introduced into Listen’s SoundCheck 20 analysis software, which is used to test automotive infotainment systems as well as other audio equipment.

The enhanced Rub and Buzz feature builds on sound psychoacoustic principles applied in Listen 2011’s perceptual algorithm. New research has led to improvements that improve listener correlation, while new noise reduction technology is supposed to ensure high repeatability and reliability. Listen claims the algorithm works like a human ear under normal listening conditions with the background noise of a manufacturing environment. Perceptual friction and hum are measured using the same stepped sine wave, simultaneously with other end-of-line measurements.

‘) } // –>

‘) } // –>

Two of SoundCheck’s virtual instruments, the Multichannel RTA and Signal Generator, have been updated. The multi-channel real-time analyzer now includes extended functionality for real-time observation of audio signals. It displays multiple channels simultaneously and offers real-time calculation and display of channel, subtraction, maximum, minimum and average power. Applications for this new feature include real-time observation of active noise cancellation, automotive industry standard six-microphone infotainment measurements, validation of headset seal on a test head prior to measurement comparing the response of the left and right headphones, and more. RTA curves are now seamlessly integrated into standard SoundCheck graphs and can be dragged and dropped into any graph for easy comparison with benchmarks and benchmarks. This is useful for quick comparisons with benchmark standards or gold units, and for tuning automotive infotainment systems.

A revised signal generator brings additional functionality and simplified operation, especially when using wav files. In addition to standard audio stimuli (sine, white noise, pink noise, etc.) with user-selected sample rates and resolution, it can play any wav file, any list file memory and any complex waveform created by the stimulus editor. Level can be referenced as peak, dB or RMS. The signal can be EQed in real time and custom EQ curves applied, which is useful when using a non-flat source such as a mouth simulator. A specific part of a waveform can be selected to play, either by selecting a start and stop time in seconds or by examining the waveform, and signals can be played for a fixed duration , a fixed number of times or in a continuous loop. The outputs of two or more signal generators can be mixed on the same channel, and waveforms from multiple signal generators can be synchronized or delayed for phase control during playback.

Several new features extend the post-processing capabilities of the software for testing communication devices. These include batch processing of external files, a silence stimulation stage, and RMS level post-processing stages as a function of time and histogram. A pre-written test sequence to categorize Doubletalk performance according to two international standards, ITU-T P.502 and ETSI TS 126 132, is also available. Other improvements include an upgrade to the stimulus editor, the ability to export multiple SoundCheck recorded waveforms to a single multi-channel wav file, and a hard reset option to quickly change audio interfaces or restore hardware to a known configuration.

About the Author

Rachel Evans

Rachel’s career in journalism has seen her write for various titles at UKi Media & Events in the automotive, tire and marine fields. Currently the editor of ATTI, her favorite part of the job is interviewing industry experts, including researchers, scientists, engineers and technicians, and learning about the breakthrough technologies and innovations that are shaping the future of transport.

Privacy Policy Designed using Magazine Hoot. Powered by WordPress.