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And as others have said, this is all eliminated by a firmware update that filters out ultrasonic frequencies.
Crane ultrasonic humidifier for around $39-$48.
Source: https://www.buzzfeednews.com/article/kristenadaway/highly-rated-and-nice-looking-humidifiers
Doctors then direct ultrasonic energy through a targeted pinpoint in the skull to the globus pallidus, a structure deep inside the brain that helps control voluntary movement.
In a statement, they said: “Noise levels produced by such ultrasonic devices are likely to be aversive to some animals, potentially causing them discomfort, fear and/or pain and predicting an individual's response is difficult.”
Source: https://www.express.co.uk/news/uk/1822152/garden-home-foxes-cctv
Nvidia was developing the software, while Valeo was providing ultrasonic sensor hardware in the collaborative project for an unnamed automotive parts manufacturer.
Source: https://www.independent.co.uk/tech/nvidia-stolen-data-video-call-b2452818.html
Of course, humans can’t hear it normally, as the noise is ultrasonic and too high-pitched, so the scientists lowered the frequency until they managed to pick up the peculiar sound.
Source: https://www.huffingtonpost.co.uk/entry/plants-cry-out-stressed-neglect_uk_6426b0cfe4b0ba5d60396114
R92 Restorations, set up by Carl Robson, is based in Hexhamshire and will offer vapour blasting and ultrasonic cleaning as some of its main services.
The necklace was fresh from a cleaning — an ultrasonic water bath, followed by a steam — and visiting the office of the jewelry designer Alex Moss in late January en route to its owner: the rapper and singer Drake.
Source: https://www.nytimes.com/2023/02/05/style/alex-moss-jewelry-drake.html