All items in category Magazine Articles
Fresh From the Bench: Illusonic IAP 8 Advanced Audio Processor and Preamplifier
by Philipp Paul Klose

Fresh From the Bench: Illusonic IAP 8 Advanced Audio Processor and Preamplifier

The Illusonic IAP 8 is an advanced multichannel audio processor and preamplifier with HDMI. It does a whole lot more, but for this audioXpress review Philipp P. Klose focused on the DSP and understanding the possibilities of the work by Christof Faller and the deep expertise of his supplier network based in Switzerland. Illusonic holds an interesting portfolio of audio technologies that support multiple companies in the audio and automotive industry. The IAP 8 is just one model from a range of multichannel processors.
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Automotive Audio: Audio System Design in the Age of Software-Defined Vehicles
by Paul Beckmann and John Whitecar

Automotive Audio: Audio System Design in the Age of Software-Defined Vehicles

As the automotive industry is undergoing a transformation and software forces a re-evaluation of audio architectures to meet new technical demands and consumer expectations, this article offers a unique perspective on where things are headed. Detailing how DSP Concepts is evolving its Audio Weaver modular audio processing framework to adapt audio systems for SDVs, the article offers unique insights on the deployment of AI-driven audio features.
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Next-Generation Klippel Loudspeaker Parameter Measurement — Fast Large Signal Identification (FLSI)
by Jonathan Gerbet

Next-Generation Klippel Loudspeaker Parameter Measurement — Fast Large Signal Identification (FLSI)

Klippel introduced the Large Signal Identification (LIS) and Linear Parameter Measurement (LPM) software tools 25 years ago to measure linear and nonlinear loudspeaker parameters in conjunction with Klippel analyzer hardware. To advance the state of loudspeaker parameter measurement, Klippel has now developed the Fast Large Signal Identification (FLSI), a new measurement software module designed to replace both LPM and LSI.
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Acoustic Simulation: EASE 5’s Acousteer Engine Redefines Design Workflows
by Stefan Feistel and Wolfgang Ahnert

Acoustic Simulation: EASE 5’s Acousteer Engine Redefines Design Workflows

Acoustic simulation has long been a cornerstone for audio professionals, yet the iterative process of design, calculation, and analysis has traditionally been hampered by significant computation times and laborious workflows. AFMG's new Acousteer engine introduces a paradigm shift, transforming direct sound field simulation into an interactive, real-time experience.
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Dayton Audio OmniMic 40k and Digital Audio Test System Loudspeaker Analyzer (DATS LA) Measurement Tools
by Vance Dickason

Dayton Audio OmniMic 40k and Digital Audio Test System Loudspeaker Analyzer (DATS LA) Measurement Tools

This article offers an overview of Dayton Audio's new OmniMic 40k and the Digital Audio Test System Loudspeaker Analyzer (DATS LA). The OmniMic 40k is a substantial upgrade from the original Dayton OmniMic V2 measurement system, while the new DATS LA is an entirely new loudspeaker measurement analyzer and software, using a patented DC offset bias technique to derive both small and large signal parameters, including both linear and nonlinear output capability.
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Patent Review: Externally Coupled Loudspeaker System for a Vehicle, and an Externally Ducted Vehicle Loudspeaker
by James Croft

Patent Review: Externally Coupled Loudspeaker System for a Vehicle, and an Externally Ducted Vehicle Loudspeaker

In this review, James Croft (Croft Acoustical) focuses on two patents. One granted to Harman Becker Automotive, and another granted the same year to Bose. The first describes a loudspeaker system arranged in a baffle inside a vehicle, configured to radiate an acoustical signal to the passenger compartment using an active noise control system.The second describes various implementations of “vehicle loudspeakers and related vehicle audio systems,” including the use of passive radiators.
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Standardized Automotive Audio Measurements
by Steve Temme

Standardized Automotive Audio Measurements

In 2023, the Audio Engineering Society (AES) Technical Committee on Automotive Audio proposed a standardized measurement configuration for in-car audio systems. This article builds on that work, using the same configuration to make a more comprehensive suite of measurements, including seat-to-seat spectral uniformity, THD, advanced impulsive distortion, as well as creating a foundation for a much wider range of in-car measurements.
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Evolution of Automotive Audio Tuning and Testing
by Jacob Soendergaard and Jesse Gratke

Evolution of Automotive Audio Tuning and Testing

Offering an updated perspective on automotive audio, this article highlights the advantages of utilizing a head-and-torso simulator (HATS) and introduces the Multi-Dimensional Audio Quality Score (MDAQS) assessment of audio quality - both key technologies pioneered by HEAD acoustics. Valuable insights about the methods used to benchmark automotive audio and advanced audio processing in modern vehicles, equipped with high channel counts and headrest speakers.
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Patent Review: Loudspeaker Enclosure with a Sealed Acoustic Suspension Chamber
by James Croft

Patent Review: Loudspeaker Enclosure with a Sealed Acoustic Suspension Chamber

James Croft reviews a design, invented in Sweden, and patented in 2018, of a new approach to an area that has been extensively researched in an effort to improve low-frequency performance in speakers. The specific design under review describes a loudspeaker enclosure housing a sealed acoustic suspension chamber, where a driver and a passive acoustic diaphragm on opposite sides are combined with a first bandpass chamber connected to the sealed chamber by the passive unit in a curved structure.
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Linearizing Microphones: CORE+ by DPA
by Eddy Bøgh Brixen and Toni Torras Rosell

Linearizing Microphones: CORE+ by DPA

This article is an exclusive report on the development of the DPA CORE+ technology at the heart of DPA's miniature microphones. Evolving over the previous CORE technology that dramatically enhanced the dynamic range of the microphones, the patent-pending CORE+ by DPA eliminates the non-linearities typically generated by the membrane and electronic components, removing any trace of distortion from the microphone output, and improving even on the already extremely high standards of the Danish manufacturer.
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