THD Podcast

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

In episode 102, Clement Lambert of Kartesian Acoustic joins us to talk about improving the dynamic capacity of drivers by focusing on the details like the delicacy of spider and surround design and how it impacts acoustic performance. Dedicated to audio excellence, Kartesian contributes to continually improving the sound quality of audio products. For over a decade, they have developed innovative technology that can be integrated into any customer demand. Kartesian products can be adapted to your specific technical requirements and brand spirit.

Located in the northeast of France, Kartesian are electro-acoustic experts, dedicated to advanced loudspeakers and audio technology. Our customers are international high-end audio, Hi-Fi, multimedia, and professional brands. They only work with suppliers oriented to innovation, able to follow our demanding quality process. They have selected the best suppliers for each loudspeaker component (magnet, frame, voice coil, ...) all over the world. Full process, from engineering to production is located in France. Every unit produced has a unique quality control number linked with our archive and stock to fully ensure the required performances for each loudspeaker.

Check out the podcast on YouTube Spotify Amazon Music iHeartRadio Rumble BitChute Limited Apple Google

Thanks to Barry Vogel and the ALTI Audio & Loudspeaker Technologies International for their support as well!

#audioengineering #acoustics #audio

Please like, subscribe, share, and comment with your feedback! Enjoy the podcast!

Support the podcast on our Patreon page: www.patreon.com/THDPodcast

www.db-ent.com

linkedin.com/in/DavidJLindberg

@dlindberg11

discord.gg/HF6NF3fc

www.kartesian-acoustic.com

instagram.com/kartesianloudspeakers

youtube.com/watch?v=Fkb600urdKw

www.totalharmonicdiscussion.com

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

In episode 101, Konstantin Davy and Andrea Greco from USound join us to update us on the journey to bring MEMS speakers to the world. They have a new MEMS speaker called CONAMARA plus an ASIC called Tarvos which is a purpose-built audio amplifier to drive their speakers. In addition, they have partnered with Luxshare and OBO Pro to combine dynamic drivers with their MEMS speakers to create 2-way speaker modules that deliver full-range sound.

USound is a fast-growing company that enables customers to bring new revolutionary audio products to the market. We provide innovative audio system solutions based on highly scalable MEMS technology. Our revolutionary products include advanced MEMS speakers, audio modules and amplifiers.

Check out the podcast on YouTube Spotify Amazon Music iHeartRadio Rumble BitChute Limited Apple Google

Thanks to Barry Vogel and the ALTI Audio & Loudspeaker Technologies International for their support as well!

#audioengineering #acoustics #audio

Please like, subscribe, share, and comment with your feedback! Enjoy the podcast!

Support the podcast on our Patreon page: www.patreon.com/THDPodcast

www.db-ent.com

linkedin.com/in/DavidJLindberg

@dlindberg11

discord.gg/HF6NF3fc

www.usound.com

linkedin.com/company/usound-gmbh

@USoundTech

www.totalharmonicdiscussion.com

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

www.patreon.com/THDPodcast

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

In episode 99, Dr Sean Olive from Harman International joins to explain the background and the rationale behind the Harman Headphone Target Curve. Some fascinating discussions on the evolution and some of the test procedures using scientific controls to produce a statistically significant study. Ultimately, it produces a line of fit between the listening experience and the frequency response to give headphone developers a target curve that satisfies most users.

Notes from the question at 41:45 from Sean Olive:

"I thought a bit more about the question Simon asked whether the target curve should be different for IE vs OE/AE types and wanted to clarify in case I misunderstood the question. He (Simon) seemed to think they should be different but perhaps he was referring to differences between targets for Type 3,3 versus Type 4.3 -- not headphone types? The baseline targets for IE and OE/AE were the same for Type 3.3 before adjustments to bass and treble were made. The baseline was determined by measuring a flat in-room speaker system. We found the IE target had about 4 dB more bass than the AE/OE target and only slightly different in treble. The same baseline for IE/ AE/OE is determined by measuring the speakers in the same room with Type 4.3 HATS. But after adjustments, I believe the IE/OE/AE will be closer than the Type 3,3 particularly in the bass b/c of the larger volume and acoustic impedance of the Type 4.3 vs 3.3. Will the headphone targets for Type 4.3 versus 3,3 be different? Absolutely, because the response and acoustic impedances are different. The main differences will be below 200 Hz and above 3-4 kHz. Hopefully, that clarifies my response to this question, if I understood it correctly."

Check out the podcast on YouTube Spotify Amazon Music iHeartRadio Rumble BitChute Limited Apple Google

Thanks to Barry Vogel and the ALTI Audio & Loudspeaker Technologies International for their support as well!

#audioengineering #acoustics #audio

Please like, subscribe, share, and comment with your feedback! Enjoy the podcast!

Support the podcast on our Patreon page: www.patreon.com/THDPodcast

www.db-ent.com

linkedin.com/in/DavidJLindberg

@dlindberg11

discord.gg/HF6NF3fc

www.harman.com

linkedin.com/in/seanolive

@seanolive

www.totalharmonicdiscussion.com

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

In episode 98, Aernout Arends the CEO of Absolute Audio Labs in the Netherlands joins to discuss their algorithm bridging the gaps from hearings to the OTC hearing assist devices. Absolute Audio Labs develops cutting-edge technology for Hearing and Voice applications. Their B2B Audio software suites - PYOUR Audio Hearing, Voice, and Safesound - cover a wide range of applications, mainly focusing on speech intelligibility, personalization, music perception, and hearing protection for TWS earbuds and Hearing Aids.

We are also joined by Adrie van Meijeren of Renasas to discuss the collaboration with semiconductor manufacturer Renesas. Renesas has selected AAL’s PYOUR Audio new 3.0 hearing suite as the solution for hearing enhancement supported on a new family of connectivity products. The collaboration intends to deliver excellent assistive hearing performance to a broad range of products from (OTC) hearing aids, TWS earbuds to unified communication headsets where it can enhance hearing in noisy environments.

Check out the podcast on YouTube Spotify Amazon Music iHeartRadio Rumble BitChute Limited Apple Google

Thanks to Barry Vogel and the ALTI Audio & Loudspeaker Technologies International for their support as well!

#audioengineering #acoustics #audio

Please like, subscribe, share, and comment with your feedback! Enjoy the podcast!

Support the podcast on our Patreon page: www.patreon.com/THDPodcast

www.db-ent.com

linkedin.com/in/DavidJLindberg

@dlindberg11

discord.gg/HF6NF3fc

www.absoluteaudiolabs.com

linkedin.com/company/absolute-audio-labs

@AAL_Audio

www.totalharmonicdiscussion.com

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

In episode 97, Vince Rey of Hottinger Brüel & Kjær (HBK) joins again from California to discuss the Buzz, Squeak, and Rattle or ‘BSR’ test audio quality metric. It was developed by Dr. Wookeun Song (HBK). This BSR metric relies on deconvolution and time-varying loudness sound quality, considering frequency and time masking on the human ear. It can be summarised as 'Does the measurement curve match the perception of the sound quality and how can we correlate the two?'

Check out the podcast on YouTube Spotify Amazon Music iHeartRadio Rumble BitChute Limited Apple Google

Thanks to Barry Vogel and the ALTI Audio & Loudspeaker Technologies International for their support as well!

#audioengineering #acoustics #audio

Please like, subscribe, share, and comment with your feedback! Enjoy the podcast!

Support the podcast on our Patreon page: www.patreon.com/THDPodcast

www.db-ent.com

linkedin.com/in/DavidJLindberg

@dlindberg11

discord.gg/HF6NF3fc

www.hbkworld.com

linkedin.com/company/hbkworld-test-and-measurement

www.totalharmonicdiscussion.com

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

In episode 96, Stefan Liebich of Elevear joins to discuss their audio algorithms for hearables that cover occlusion, idle noise, and immersive 3D audio. Developed over many years and now being commercialized with key silicon partners.

OCCLEAR® TECHNOLOGY NATURAL OWN VOICE THROUGH OCCLUSION CANCELLATION

Existing headphones isolate the user from the environment, making their voice sound boomy and unnatural to them. This phenomenon is due to the occlusion effect, which attenuates air-conducted sound while amplifying body-conducted sound. A headphone user who is unhappy with the unnatural sound of their own voice. A headphone user who enjoys a natural own-voice sound thanks to the Occlear® technology. Our Occlear® technology eliminates the occlusion effect, allowing hearables users to perceive their voice and environment with natural clarity. Occlear® requires no specialized hardware and can be integrated seamlessly into ANC-ready hearables via a simple firmware update.

IDLE NOISE REDUCTION TECHNOLOGY WORLD-CLASS HISS-FREE TRANSPARENCY FOR YOUR HEARABLE

Hearables users often complain about microphone noise or hiss when using transparency mode. It stems from the low-cost, miniature microphones used in today’s hearables. To mitigate this noise, manufacturers often limit the bandwidth of their transparency mode, compromising the clarity of the sound. Our patented Idle Noise Reduction (INR) technology reduces the noise floor of hearable microphones by 10–15 dB, matching the performance of high-end studio microphones. The INR removes the hiss, allowing hearables manufacturers to achieve world-class transparency with low-cost components.

IMMERSIVE 3D AUDIO TECHNOLOGY INSTANT, UNALTERED 3D AUDIO WITHOUT LATENCY OR DISTORTION

Existing spatial audio solutions often struggle with head movement, resulting in a lag that disrupts the immersive experience. They also tend to compromise sound quality by adding reverb.

With imperceptible motion-to-sound latency, our algorithms ensure that the audio keeps pace with your every move. This seamless integration means you experience the world of sound most naturally as you navigate through it. Experience unaltered, high-fidelity audio that runs directly on your hearable device—no need for complex stack adjustments, including Bluetooth and app dependencies.

Check out the podcast on YouTube Spotify Amazon Music iHeartRadio Rumble BitChute Limited Apple Google

Thanks to Barry Vogel and the ALTI Audio & Loudspeaker Technologies International for their support as well!

#audioengineering #acoustics #audio

Please like, subscribe, share, and comment with your feedback! Enjoy the podcast!

Support the podcast on our Patreon page: www.patreon.com/THDPodcast

www.db-ent.com

linkedin.com/in/DavidJLindberg

@dlindberg11

discord.gg/HF6NF3fc

www.elevear-tech.com

linkedin.com/company/elevear

www.totalharmonicdiscussion.com

In episode 95, HBK - Hottinger Brüel & Kjær's Vince Rey joins to discuss their new 5128 head & torso simulator (HATS) plus their 4620 couplers.

The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market.

In episode 94, Marie-Eve Desrochers joins to introduce their technology that targets to bring efficiencies and speed to the edge in MEMS microphones. Echosonic aims to develop next-generation MEMS smart microphones using reservoir computing technology to enable on-sensor audio signal processing using machine learning for both inference and software upgrading.

Check out the podcast on YouTube Spotify Amazon Music iHeartRadio Rumble BitChute Limited Apple Google

Thanks to Barry Vogel and the ALTI Audio & Loudspeaker Technologies International for their support as well!

dB Enterprises #audioengineering #acoustics #audio

Please like, subscribe, share, and comment with your feedback! Enjoy the podcast!

Support the podcast on our Patreon page: www.patreon.com/THDPodcast

www.db-ent.com

linkedin.com/in/DavidJLindberg

@dlindberg11

discord.gg/HF6NF3fc

www.echosonic.ca

linkedin.com/company/echosonicai

www.totalharmonicdiscussion.com