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8 Actively Enhancing Our Hearing
By J. Martins and Mike Klasco
In this Market Update focused on headphones, we take a closer look at how the industry is transitioning from headphones and earphones to active designs, fostering the booming true wireless and hearables categories.

22 Tackling Voice Capture and Processing Technologies
By J. Martins
In this Market Update, we examine what voice can do for audio development, focusing on voice recognition and what voice capture and processing technologies can do for audio manufacturers and the audio industry in general.

32 Objective Listening Effort Evaluation
By Hans W. Gierlich and Jan Reimes
This article discusses “listening effort analysis,” a new model that can be used to test active noise cancellation (ANC) performance in complex scenarios where the system needs to distinguish between speech signals as part of the background noise and speech signals directed toward the users of these devices.

48 Sound Cards for Data Acquisition in Audio - The Linear Audio Autoranger Mk II Interface
By Stuart Yaniger
New possibilities in audio measurement systems, expanding on the basics of using sound cards combined with new accessible-to-all software tools, and a recently improved measurement interface option.

56 Powering Your Circuits (Part 3) - AC Power Rectification and Smoothing
By Ed Simon
After discussing battery power and AC power supplies, this article expands the discussion to transformers and power rectification.

44 Loop Gain and Phase Margin Considerations in Applying Fully Differential Amplifiers to Active Filters
By Michael Steffes

60 Triode Power Amplifiers
By Richard Honeycutt

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