EE Times | Electronic Engineering Times’ Post

A quick note on the USB microphone image. Yes, the noise level is still high, but it’s just a wash of noise and steady-state energy bands. The “structured noise” of clanks and bangs and grinding noises (at least, that’s how they sound time-expanded) associated with the SD card being active are absent, which makes the recording free of the sonic artefacts that might confuse an auto classifier, or a human. Given all that, I’m presently investigating a “split pippyg” with a powered microphone and a separate recorder, both in the same form factor. The powered mic is just the microphone, op-amp, Rs and Cs and an LDO to drop the battery to 3.3v. The recorder is the current pippyg, minus the microphone, both devices initially to sprout a 3.5mm stereo jack unless somebody suggests a better connector. By amplifying the mic signal to 3.3V on a unit that has no SD activity I’m hoping to reduce the structured noise by more than 40dB, which will effectively make it go away. Fingers crossed for that! A powered mic should be good for months of unattended operation up a tree or in a loft. (If the mic circuit consumes 1mA, then 2450mAh turns into 100 days of operation). That much unattended time would allow the device to be placed just once per season in really awkward places, running a long stereo cable down to where the recorder can be positioned, and surveyors can then easily access the recorder to swap out SD cards at their leisure. The 'set date and time via microphone' for current pippygs would no longer work, but alternatives are already in place via the patchpipistrelle tool in the deliverables package, and although not ideal they leave the real-time clock accurate to within a couple of seconds. In fact they could be accurate to within 1/10 if a second if you switch on a freshly-flashed device while looking at a watch tick down the time. If this approach is of interest to anyone - in particular if it could be useful this upcoming bat season, which is almost upon us - let me know and I may be able to accelerate things enough to get hardware into people's hands by 1st May. But bear in mind, all this sounds great, but recording quality will always be AudioMoth-like, not Petersson-like! But also bear in mind, a split pippyg as described would cost you under £25 per pair if you built 10 😀👍🦇

Bluetooth is always marching forward, introducing new capabilities regularly. The hottest new feature to look forward to is Bluetooth Channel Sounding. This is a ranging technology where two BLE devices can perform a distance reading between themselves to get a measurement with about +/-50cm accuracy. While UWB operates at a higher frequency and therefore can resolve distances with higher accuracy, BLE radios are cheaper and much lower power, so look for Channel Sounding to make a big impact in "Find My" type functionality in the coming years. If you need to know how far apart two or more BLE devices are, Channel Sounding can help. If you want to evaluate Channel Sounding today, you can try our Nordic Distance Measurement firmware today and then implement Channel Sounding in your product down the road as it becomes available. There are so many use cases for Channel Sounding! What will you do with it?

This popular blog post previews the Auracast™ retrofit solutions and opportunities explored in the recent report from ABI Research: https://bit.ly/3LntW6e #Bluetooth #Auracast #LEAudio

Beats Pill Bluetooth Speaker Review: Back From the Dead and Improved in a Few Key Ways - CNET https://lnkd.in/dYdYZQ4A #tech #womenintech #technie

💛 【TRIBIT StormBox 2】 💡 "If you're looking to stretch your dollars, it's among the best Bluetooth speakers you'll find at this price, and even above." ——WIRED 📒 Check out the detailed review here: https://lnkd.in/gstQntqF #TRIBIT #WIRED #review #Bluetoothspeaker

Our latest blog post previews the Auracast™ retrofit solutions and opportunities explored in the recent report from ABI Research: https://bit.ly/3UehBW6 #Bluetooth #Auracast #LEAudio

It is great to see the new high-accuracy distance measurement capabilities of #Bluetooth devices using #ChannelSounding. These new capabilities are radically better than the current approaches, which are mostly based on signal strength/RSSI. With #ChannelSounding, you can measure the distance between #Bluetooth devices with centimeter accuracy. Which of your BLE-based products/systems would improve if they could be accurately located?

Exciting news in the world of Wireless Audio 🔉. Bluetooth Aurcast™ is now gaining a lot of traction! 🔥 Not familiar with Bluetooth LE Audio and Auracast™? This new feature of LE Audio will make it possible to set up *local Bluetooth audio broadcast streams* that can be tuned into by an UNLIMITED number of listeners, something that no other audio technology has achieved before! Think of it like a "localized FM radio station", but with a much richer user experience. This includes capabilities like: ✅ Multi-stream broadcasts. For example, the same stream in multiple languages could be used for a movie, a large conference, guided tours, sports commentary, etc. 🌎 ✅ Multiple streams of different quality (high quality + standard quality of the same stream) 🎛️ ✅ Private broadcast audio streams that are encrypted and can only be tuned into by authorized listeners 🔐 ✅ All of these can be tuned into directly via earbuds, headphones, wireless speakers, and even hearing aids 🎧 🦻 ✅ The possibilities are endless! 🚀 NXP Semiconductors is making this a reality with its new #NXH3675 Bluetooth LE Audio chipset, which is capable of streaming two stereo Auracast streams of 48 kHz each from a single transmitter! 👌 In my most recent #YouTube video, I cover this new chipset in detail, especially its Auracast capabilities. 📹 It also includes an exclusive demo of broadcasting TWO high-quality stereo 48 kHz Auracast streams from a single transmitter! All with an end-to-end latency of just ~35 ms 🤯 Check out the link to the full YouTube video in the comments section below 👇🏻 Bluetooth SIG, NXP Semiconductors #Auracast #LEAudio #Bluetooth #BluetoothLowEnergy #BLE #BluetoothLE #Audio #Broadcast #Wireless