audioXpress Magazine - June 2021

In this issue

8 Tech for the Automotive Framework Audio solutions that are transversal to the vehicle’s design and human interface.
20 The Changing Automotive Environment in 2021 This update on the automotive audio industry discusses what is new in the user interface to the audio system, how cockpits are changing, and the approach to optimizing them for the end user’s audio needs.
28 Vehicle Electrification and Active Noise Cancellation The Driving Forces Behind Innovation in Future In-Vehicle Infotainment (IVI) Systems This article examines noise sources in automobiles and discusses various noise cancellation technologies to better understand the future of sound management in car audio systems.
38 KEF LS50 Meta Loudspeaker- A Material Improvement In 2020, British brand KEF updated its extremely popular LS50 speaker design and introduced the LS50 Meta, an improved version of the original LS50 passive design.
48 Measuring Vibration with Piezoelectric Sensors (Part 3) - The Piezoelectric Amplifier Measuring vibration using Piezoelectric Sensors, the design and construction of the piezoelectric amplifier and presents the measurements he took to evaluate the system.
56 Noise Is Everywhere— Even in MC Input Transformers (Part 2) Demonstrates that it is good practice to measure a transformer with an input load, and that a MC step-up transformer (SUT) produces noise because of its insignificant but non-zero impedance.
62 The Science and Physics of High-End Mic-Preamp Design (Part 5) - The Best Practice Physics that play a fundamental part in microphone pre-amplifier design, explored its inhabitance in the real practical world to retain the fidelity of the mic signal along its path from transducer to output, and looked at what (theoretically) contributes to perfect active mic preamps.