Smartphone User Experience Analysis – Audio (II)

It is difficult to find information about smartphone audio input testing because the techniques are so uncommon and complicated. Since Allion has conducted audio testing for many years, we have accumulated a body of knowledge and practical experience in audio input testing, including testing of headphone input jacks and built-in microphones. In this article, we present our audio input test methods and some sample test results based on some recent test data.

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Capacitor Products- Audio Quality Analysis (III) – Product Differentiation Testing

Seeing that the previous two rounds of audio quality testing failed to find any significant differences in performance based on capacitor type, Allion decided to investigate additional testing strategies. After some research, we found that some audio magazines mention a ‘whisper’ or ‘breathing’ sound, which inspired this third round of testing.

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Capacitor Products – Audio Quality Analysis (II) – Advanced Testing

In our first round of audio quality testing (see previous article), Allion used precision test instruments to measure the sound quality of a high-quality PC motherboard. The primary goal was to compare the audio performance with different capacitor types. We used standard audio test criteria commonly applied to laptops, limited testing to the audible frequency range (20 Hz-20 KHz), and only tested the most common audio sampling rates (44K and 48k). However, the test results for the first round of testing were uninformative, since the audio quality measurements were nearly identical for both types of capacitors (solid and electrolytic).

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