BRN Discussion Ongoing

[Fullmoonfever]

Hadn't thought about something like this implementation.

Chinese registered company TDA blog post from a few days ago.

Quite a few known names use, operate and manufacture in this space like TDK, Nordic, Texas, Tesla, Apple, Siemens, Bosch, Airbus etc.

Little paragraph near the bottom, about where we might fit in the Piezo Buzzer landscape.

Piezo Buzzers: Precision Acoustic Engineering Driving Innovation in Smart Devices and IoT Ecosystems- Changzhou Haoxiang Electronics Co., Ltd-TDA Company

The evolution of piezoelectric buzzers from rudimentary alarm components to sophisticated acoustic transducers underscores their pivotal role in enabling next-g...

www.tda-buzzer.com

07 May, 2025

Posted by: Admin

Piezo Buzzers: Precision Acoustic Engineering Driving Innovation in Smart Devices and IoT Ecosystems​

The evolution of piezoelectric buzzers from rudimentary alarm components to sophisticated acoustic transducers underscores their pivotal role in enabling next-generation smart technologies. With advancements in materials science, resonant frequency control, and energy-efficient designs, modern piezo buzzers are redefining human-machine interfaces across automotive, healthcare, and industrial automation sectors. This article examines the technological breakthroughs, application frontiers, and sustainability challenges shaping this critical component’s future.

1. Core Material Innovations and Frequency Optimization​

Piezo buzzers leverage the inverse piezoelectric effect, where voltage-induced mechanical deformation generates sound. Recent material breakthroughs have enhanced their performance envelope:

• Lead-free piezoceramics: Compliant with RoHS 3/REACH, bismuth sodium titanate (BNT)-based composites achieve d₃₃ coefficients >150 pC/N while eliminating Pb(Zr,Ti)O₃ toxicity.
• Multilayer laminates: TDK’s CMBPHD series stacks 12–16 ceramic layers (20 μm thickness), boosting output to 95 dB SPL at 5 Vpp with 30% lower power consumption.
• Frequency agility: MEMS-based designs (e.g., Knowles’s SPM0424HD5H) enable programmable frequencies from 2 kHz to 20 kHz, allowing adaptive noise masking in variable environments.

Research at Fraunhofer IKTS demonstrates laser-trimmed piezoelements with ±1% frequency tolerance, critical for automotive CAN-bus synchronization and medical device alarms meeting IEC 60601-1-8 standards.

2. Ultra-Low-Power Architectures for IoT and Wearables​

As battery-dependent devices proliferate, piezo buzzers are being re-engineered for micro-power operation:

• Resonant drive circuits: Class-D amplifiers with burst-mode excitation (e.g., Texas Instruments’ DRV8601) reduce current draw to 0.8 mA at 3 dB SPL, extending coin-cell lifetimes by 6x.
• Energy harvesting integration: KEMET’s PEH5 series combines buzzers with PVDF films, converting ambient vibrations into 12 μW/cm² auxiliary power.
• Bluetooth LE synchronization: Nordic Semiconductor’s nRF52840 enables mesh-network buzzers in smart factories, achieving <2 ms latency for synchronized alerts.

Notably, Apple’s AirTag employs a 2.4 mm-thick piezo buzzer consuming 0.25 mW—50% leaner than previous generations—to maintain 18-month CR2032 battery life.

3. Harsh Environment Reliability and Acoustic Customization​

Modern applications demand resilience under extreme conditions:

• Conformal coatings: Parylene HT®-encapsulated buzzers (IP69K-rated) withstand 1,500 hours of salt spray (ASTM B117) and 125°C autoclave sterilization cycles.
• Directional sound shaping: Murata’s MA40MF14-7B utilizes 3D-printed Fresnel lens attachments to focus 85 dB SPL output into 30° beams for industrial robot collision warnings.
• Self-diagnostic capabilities: STMicroelectronics’ LIS25BA MEMS integrates accelerometers to detect diaphragm fouling or cracks, triggering predictive maintenance alerts via IIoT platforms.

Tesla’s Cybertruck features multi-array piezo buzzers with active noise cancellation (ANC), neutralizing road noise while emitting pedestrian alerts compliant with UN R138-03 regulations.

4. Emerging Applications in MedTech and Industry 4.0​

Piezo buzzers are enabling paradigm shifts across industries:

• Implantable drug delivery: Medtronic’s SynchroMed™ II pump uses 40 kHz ultrasonic buzzers to clear catheter blockages via cavitation, reducing surgical interventions by 70%.
• Predictive maintenance: Siemens’ Sensformer® employs resonant frequency analysis (0.1 Hz resolution) to detect transformer oil degradation through buzzer-induced vibrations.
• Tactile human-machine interfaces (HMI): Bosch’s haptic steering wheel integrates 32 micro-buzzers (0.6 G-force resolution) for lane-keep warnings in electric vehicles.

In aerospace, Airbus’s A350 XWB uses piezo arrays to generate anti-icing ultrasonic waves (25–30 kHz) on wing leading edges, cutting de-icing fluid use by 40%.

5. Sustainability Challenges and Circular Manufacturing​

Despite advancements, the industry faces pressing environmental hurdles:

• Rare-earth dependencies: Dysprosium-doped ceramics enhance thermal stability but rely on geopolitically sensitive supply chains.
• Recycling complexities: Current methods recover only 23% of PZT material due to silver electrode contamination, spurring R&D into water-jet delamination (PiezoKinetics’ EcoRecover™).
• Carbon footprint: Traditional sintering (1,250°C for 4+ hours) accounts for 65% of emissions, driving adoption of FAST/SPS techniques (30-minute cycles at 900°C).

Initiatives like the EU’s PiezoGreen consortium aim to develop bio-based piezoelectrics (cellulose-starch composites) with 50% lower embodied energy by 2026.

6. Future Frontiers: From Flexible Electronics to AI-Driven Acoustics​

Next-generation innovations promise transformative capabilities:

• Printed piezoelectrics: PANIPUR® by Panasonic enables roll-to-roll fabrication of 100 μm-thick buzzers for curved displays and smart packaging.
• Neuromorphic soundscapes: BrainChip’s Akida™ AI processor analyzes ambient noise in real time, dynamically adjusting buzzer frequencies to match human auditory sensitivity curves.
• Quantum tunneling composites (QTC): Peratech’s pressure-sensitive buzzers enable dual-mode operation (silent haptics + audible alerts) in AR/VR headsets.

 

[MDhere]

Antonio has put this to bed. Can we please bury this and move on. We are not moving to the US. End of story.

Not end of story. Yes Antonio may have put it to bed but as we all know we don't stay in bed forever unless its no longer breathing. So I think Antonio just moved it to the side to get on with the program. Once the sp and things are rolling the right way its easy for the Company to spring it back out of bed as its already out their. In fact I for one am happy its been mentioned, now it's just a matter of getting it out of bed at the right time. But for now I agree its in bed sleeping.

 

[IloveLamp]

Antonio has put this to bed. Can we please bury this and move on. We are not moving to the US. End of story.

 

[MDhere]

View attachment 84762

talking about bed, it's way past your bed time! lol But as for me i'm on a 12 hr shift with 5 hours to go....
Happy Monday fellow Brners (decided to get that in early since its 1am!)

 

[MegaportX]

View attachment 84762

He should be charged with falsifying Price Sensitive ASX announcements, surely the motive was unscrupulous after lying to the audience.

 

[DK6161]

View attachment 84762

Keyword: Evaluates.
Not happening anytime soon. Let's move on

 

[IloveLamp]

Keyword: Evaluates.
Not happening anytime soon. Let's move on

You said it wasn't happening, i said you are wrong. No one said it would happen soon, but is it IS being considered.

 

[DK6161]

You said it wasn't happening, i said you are wrong. No one said it would happen soon, but is IS being considered.

You made it sound imminent.
Just pointing that out.
Remember the last time someone from the company said something was imminent? Well there you go.

 

[IloveLamp]

You made it sound imminent.
Just pointing that out.
Remember the last time someone from the company said something was imminent? Well there you go.

I simply posted what the ann was, but whatever dk

 

[Frangipani]

Uni Luxembourg’s SIGCOM (Signal Processing and Communications) research group, which is part of SnT (Interdisciplinary Centre for Security, Reliability and Trust), has a new lab, which their Akida Shuttle PC now calls home: the TelecomAI-Lab, led by Flor Ortiz.

“Unlike traditional communication laboratories, TelecomAI-Lab focuses on AI-native solutions for signal processing and network optimisation.”

There is also an interesting section on “Services offered”.

New HW Lab at SIGCOM, aggregating our capabilities on AI accelerators and Neuromorphic processors. | Symeon Chatzinotas

New HW Lab at SIGCOM, aggregating our capabilities on AI accelerators and Neuromorphic processors.

www.linkedin.com

View attachment 77272

TelecomAI - Lab

The TelecomAI at the University of Luxembourg is used for research and testing of signal processing techniques for satellite and terrestrial communication systems.

www.uni.lu

View attachment 77271
View attachment 77273
View attachment 77274

The Akida Shuttle PC from the TelecomAI-Lab at Uni Luxembourg’s Interdisciplinary Centre for Security, Reliability and Trust (SnT) was recently presented to the interested public at a booth showcasing the SIGCOM Research Group’s neuromorphic research (utilising both Loihi and Akida) on the occasion of SnT Partnership Day:

🛰️ On May 7th we celebrated the SnT Partnership Day #pday2025, where with the help of Suleima B., and Flor Ortiz, we organized a fantastic booth to showcase the SIGCOM Research Group activities and… | Eva Lagunas

🛰️ On May 7th we celebrated the SnT Partnership Day #pday2025, where with the help of Suleima B., and Flor Ortiz, we organized a fantastic booth to showcase the SIGCOM Research Group activities and lab-facilities related to neuromorphic computing. More info: https://lnkd.in/ef_nhqyz SnT...

www.linkedin.com

Personal Website of Dr. Eva Lagunas - TelecomAI-Lab

Description: Led by Dr. Flor Ortiz and Suleima Briseño, the TelecomAI-Lab focuses on the research and development of embedded Artificial Intelligence solutions designed to optimize and revolutionize wireless communications, incorporating neuromorphic computing and satellite applications. Objectives

sites.google.com

Partnership Day 2025: Powering AI innovation

Prime Minister Luc Frieden visiting SnT's partnership Day

www.uni.lu

“AI is everywhere in our daily lives, but also in scientific research. The SnT Partnership Day 2025 showcased concrete projects.

Artificial intelligence is no longer a distant concept. It’s reshaping how we work, communicate, and innovate. On 7 May 2025, SnT’s annual Partnership Day brought together 700 participants from research, industry, and government representatives at the European Convention Centre Luxembourg (ECCL) to explore how AI is moving from theory to practice.

SnT is the University of Luxembourg’s tech research hub. The event highlighted how research partnerships are delivering real-world impact (…).”

Partnership Day 2025

Explore this photo album by SnT University of Luxembourg on Flickr!

www.flickr.com

 

[HopalongPetrovski]

It strikes me as strange that Nanovue (NVU) can today make a price sensitive announcement on the ASX that they are in effect doing a science experiment on their edge device to prove it may be useful and efficient in drones.
Seems they are cutting our lunch somewhat.
Good for them but just seems to illustrate a double standard in what is acceptable conduct in regards ASX announcements.

 

[jrp173]

I simply posted what the ann was, but whatever dk

Unfortunately some people just refuse to see what is happening.

How any can be okay with what's going on is crazy. Our Chairman told bold faced lies at the AGM (not just about the domicile) and the board sat and said nothing.

If this is not has not caused huge warning bells, then people are not paying attention.

This behaviour speaks volumes about our management.

 

[7für7]

Morning Chippers,

Conversion = AU$0.2654376 per share.

Hopefully mooving on up.

Regards,
Esq.

That’s what I told you! I don’t trust aftermarket movements

 

[overpup]

I find it amusing that the Loihi2 board has a "fragile, do not touch" sign...
Pretty much says it all really

 

[Guzzi62]

Unfortunately some people just refuse to see what is happening.

How any can be okay with what's gong on is crazy. Our Chairman told bold faced lies at the AGM (not just about the domicile) and the board sat and said nothing.

If this is not has not caused huge warning bells, then people are not paying attention.

This behaviour speaks volumes about our management.

And you point that out to us every day.

It is what it is, sell and move on if you can't take it, is that so hard?

So the domicile is shelled for now, as in 2017, okay noted, won't lose a minutes sleep over it.

I am buying more shares when I can.

You go back on ignore, a waste of time reading your negative posts, like the HC, a lot on ignore over there, you should go over there, you fit right in, complaining day after day, pathetic!

 

[jrp173]

And you point that out to us every day.

It is what it is, sell and move on if you can't take it, is that so hard?

So the domicile is shelled for now, as in 2017, okay noted, won't lose a minutes sleep over it.

I am buying more shares when I can.

You go back on ignore, a waste of time reading your negative posts, like the HC, a lot on ignore over there, you should go over there, you fit right in, complaining day after day, pathetic!

Guzzi62 I thought you were putting me on ignore.. can't help yourself eh....you are too funny....

 

[jrp173]

Calling me blind, huh?

There are different scenarios Mr negative.

You go on ignore, I am not wasting anymore time on you.

Bye bye.

You couldn't even ignore my posts for one week...

 

[Mccabe84]

Dropped all the way down now back up

 

[Bravo]

Where's the defibrillator? We appear to be flatlining...

 

[Pom down under]

Where's the defibrillator? We appear to be flatlining...


View attachment 84778

Can it be lDA offloading more of the shares they need to sell? As reading here over the last week ain’t BRN meant to be getting a much higher price than current SP? So if it’s not them then I guess we will see a much higher short position be taken