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Complete End-of-Line Speaker Test (includes ePRB and eLP)

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This sequence is an example of the many types of tests that can be performed quickly and simultaneously on a loudspeaker production line. A stepped sine sweep (StweepTM) from 20 kHz to 50 Hz is played through the speaker under test and measured via two channels of the audio interface. A calibrated reference microphone is connected to one of the channels and an impedance reference built into the SC Amp or AmpConnect is connected to the other. A HarmonicTrak™ Analysis step analyzes the recorded waveform from the reference microphone and outputs Frequency Response, THD, Normalized Rub & Buzz, Perceptual Rub & Buzz (ePRB), Loose Particle Prominence and Threshold (eLP) and Polarity. A Post-Processing step calculates the Average Sensitivity from 100 – 10kHz. A second Analysis step analyzes the recorded waveform from the impedance reference and outputs a curve of impedance versus frequency. A Post Processing step performs a curve fit of the impedance curve and calculates the max impedance (Zmax), precise resonance frequency (f0), and the quality factor (Q) of the resonance peak. All measurements and parameters are tested against limits in Limit steps. All these limits can be adjusted to suit your own DUT.

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New Manufacturing Manager: Ryan Burgess

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Ryan Burgess has joined Listen as Manufacturing Manager, responsible for all manufacturing functions including supply chain, assembly, test, Quality Control, and product delivery. Ryan is an experienced manufacturing professional with 20 years’ experience in Engineering, Manufacturing, Supply Chain, and Quality Control Systems.  He attended Clark University focusing on Computer Science, minoring in Mechanical Engineering, and also holds several certifications including a Six Sigma Green Belt, certified internal auditor and LEAN Bronze certificate. Prior to joining Listen, Ryan has held management roles in the mass notification industry, aerospace industry, industrial technology, and a global technology solutions company.  In his free time Ryan enjoys spending time with his wife and six children, music, sports, and home improvement.