audioXpress April 2021 PDF

Volume 52
Issue 4
April 2021  

• FROM THE EDITOR’S DESK—Enhanced Audio Quality Frontiers,
  by J. Martins, p. 4
• MARKET UPDATE—Unifying Communications with Amplified Intelligence,
• by J. Martins, p. 8
• Speaker ID Technology, by Vikrant Singh Tomar, p. 18
• MARKET UPDATE—True Wireless Earbuds Evolving Toward Hearables,
  by J. Martins, p. 22
• The Evolution of True Wireless Stereo, by Jean-Marc Luneau, p. 30
• SOUND CONTROL—One Traditional Way to Increase Loudspeaker Directionality, by Richard Honeycutt, p. 38
• AUDIO SCOPE—Improving the Input Noise Model for High Output Current Dual Headphone Driver, by Michael Steffes, p. 44
• Measuring Vibration with Piezoelectric Sensors (Part 1): The Research,
  by George Ntanavaras, p. 48
• The Science and Physics of High-End Mic-Preamp Design (Part 3):
  Considering the IC Options, by Mike Meechan, p. 56
• The Best of Two Worlds: An Old-Fashioned Tube Amp and Multilevel Class-D Hybrid DIY Bass Guitar Amplifier Project, by Jens Tybo Jensen, p. 62