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Audio

Class-D amplifiers operate at 2MHz switching frequency to reduce PCB space

June 11, 2025 By Redding Traiger

STMicroelectronics has revealed new class-D automotive audio amplifiers for smart-cockpit applications, engineered for tiny overall dimensions and with a digital input that simplifies circuit design. The new HFDA80D and HFDA90D extend ST’s family of high-frequency automotive amplifiers, complementing the HFA80A analog-input IC. All the devices operate at a switching frequency of 2MHz to save PCB […]

Filed Under: Amplifiers, Audio, Automotive/Transportation, Products, Tools Tagged With: STMicroelectronics

How op amps work and why you should use them: part 1

April 30, 2025 By Bradley Albing

Operational amplifiers (op amps) may initially look intimidating, but with a bit of study, they can be easily understood and used in a variety of applications. Op amps can be thought of as a perfect amplifier in a black box. When we create a design using an op amp, we initially presume that the device […]

Filed Under: Amplifiers, Audio, audio, FAQ, Featured Tagged With: FAQ

Infrared preamps improve sensitivity and better reject interference

March 6, 2025 By Redding Traiger

Vishay Intertechnology, Inc. announced that it has upgraded its VSOP383xx series of preamplifier circuits for infrared (IR) remote control applications in consumer products with the new Cyllene 2 IC. Offered in the 2 mm by 2 mm by 0.76 mm QFN package, the enhanced solutions provide drop-in, plug-and-play replacements for existing devices in the series […]

Filed Under: Amplifiers, Audio, Products, Tools Tagged With: vishay

13 mm x 13 mm surface mount speaker runs at 8 Ohms

October 29, 2024 By Redding Traiger

Same Sky’s Audio Group announced the addition of two surface mount models to its speakers product portfolio. The CMS-131304-SMT-TR and CMS-151504-SMT-TR are surface-mount miniature speakers, housed in compact 13 x 13 x 4 mm and 15 x 15 x 4 mm square frame packages, respectively. Both models are reflow solder compatible while featuring polyurethane cones and […]

Filed Under: Audio, Products, Tools Tagged With: sameskysaudiogroup

IoT front end module designed in adherence to Thread and Matter

January 10, 2024 By Redding Traiger

pSemi Corporation announced the introduction of their smallest PA-LNA-SW Internet of Things (IoT) front-end module (FEM): the PE562212. Designed in adherence to the Thread and Matter protocols, industry frameworks that focus on simplifying connected experiences, PE562212 is an ultra-compact multi-protocol 2.4 GHz FEM that enables a variety of connectivity options for IoT devices. With a […]

Filed Under: Audio, Industrial, IoT, Products, Tools, Wearables, Wireless Tagged With: psemi

What are the computational requirements of immersive audio?

December 1, 2023 By Jeff Shepard

There are several ways to implement immersive audio, each with different computational and hardware needs. Calculation of the head-related transfer function (HRTF) is an important aspect of deploying immersive audio. This FAQ begins by detailing what an HRTF is, looks at an open-source program for calculating HRTF, and then considers how cameras and inertial measurement […]

Filed Under: Applications, AR/VR, Audio, FAQ, Featured Tagged With: FAQ

What’s the difference between object- and channel-based audio?

November 29, 2023 By Jeff Shepard

Immersive audio uses various channel- and object-based techniques to deliver a high-quality listening experience. There are three general categories of spatial audio: channel-based audio (CBA), object-based audio (OBA), and scene-based audio (SBA) — that’s the next generation of OBA. CBA is the simplest form of spatial audio, but it’s not immersive. The basic form of […]

Filed Under: Audio, FAQ, Featured Tagged With: FAQ

What codecs are there for immersive and 3D audio?

November 27, 2023 By Jeff Shepard

Immersive audio is a three-dimensional (3D) sound field created by combining lateral and overhead speakers. A variety of industry standard and custom codecs are available for implementing immersive audio. This FAQ reviews the operation of the MPEG-H Audio (universal immersive audio coding) codec and the still-under-development MPEG-I Immersive Audio (compressed representation for virtual and augmented […]

Filed Under: Audio, FAQ, Featured Tagged With: FAQ

How does artificial intelligence relate to immersive audio?

November 20, 2023 By Jeff Shepard

Tools like neural networks (NNs), machine learning (ML), and artificial intelligence (AI) are being applied to hard problems related to immersive audio. This FAQ will examine how NNs and ML are being used to up-mix audio tracks into their original constituent parts, how NNs are being used to produce personalized head-related transfer functions (HRTFs) and […]

Filed Under: Applications, AR/VR, Audio, FAQ, Featured Tagged With: FAQ

What is immersive audio and how does it work?

November 17, 2023 By Jeff Shepard

Immersive audio extends conventional surround sound technology into the third dimension. It adds height and more to the audio experience. This FAQ presents some of the basic concepts of immersive audio, looks at how ambisonics relates to immersive audio, and closes by looking at a new recommended immersive audio system design practice. Immersive sound transforms […]

Filed Under: Audio, FAQ, Featured Tagged With: FAQ

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