Category: ESP32
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My 1″ Geophone Tracked A Mighty Freight Train
I have been working and experimenting for several weeks with geophones, transducers, and spectral analysis software in furtherance of my Hyperscale Data Center Sound Monitor project. Freight trains are known to emit low-frequency and infrasonic energy, so I have made it my business to become a temporary train tracker. I’m currently collecting 330 samples/second from…
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Baby’s First Infrasound Detection
Absolutely extremely technical I have a Sensirion transducer (SDP810-125PA at DigiKey $30.85) hooked up to an ESP32-S (ESP32-S3 Feather 8MB with w.FL Antenna at Adafruit $17.50). The transducer is for capturing infrasounds (< 20 Hz). Today was a milestone: the transducer detected an infrasound — its first “baby.” I am building this experimental device inspired…
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MEMs Microphone Investigation
<p><strong>Technical / DIY</strong> — for those interested in do-it-yourself sound monitoring of hyperscale data centers and related circuitry</p> <p>I’ve been mulling over Preston Blackburn’s Remote Audio Monitor design (see <a href="https://salemdata.net/johnpress/?p=1223">Monitor Sounds From a Data Center?</a>) and assessing its ability to monitor infrasound (<20hz) and low frequencies between 20 Hz and 50 Hz. Blackburn uses…
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Monitor Sounds From A Data Center?
A recent article, “[t]he complex corporate web behind a \$3.2 billion AI data center When multiple companies are behind one project, who bears responsibility for problems?” published by Ars Technica at link, intrigued me. There was a reference to a resident living in a house built in 1892 who complained of the constant noise from…
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An In-House Text-to-Speech Service for ESP32 Projects
Making your ESP32 Talk. YouTuber Dronebotworkshop published a video “Text to Speech on ESP32 – Wit.ai & OpenAI TTS“. “Text to Speech” is often referred to by the acronym TTS. His solution encompasses using third-party services, specifically Meta and OpenAI. For Meta, you have to have an account and you create an application within your…