It mimics the function of hair cells found in the ear.
"We were inspired by the previous work by Bryan Joyce et al., who used cantilevers with complex feedback to achieve the specific properties of the hair cells. We thought that we can create artificial hair cells quite easily and efficiently since we have a specific type of cantilevers which can be read out and actuated completely electronically."mimics the different hair cells contained in ears that are responsible for detecting distinct tones.
"Hair cells in the ears can be individually tuned, in particular the gain for detection, and thus how each tone is detected can be adjusted," Lenk explained. "This is important if we want to separate, e.g., speech from background signal. In this case, the gain would be high for the tones belonging to the speech signal and low for the background signals. In this way, background and speech can be much easier be separated."
The invention consists of two key components: a series of small silicon cantilevers designed to act as artificial hair cells and a feedback loop that tunes the detection properties of each cantilever individually. "We successfully implemented the properties of human hearing directly in the sensor via a quite simple and fast feedback loop," Lenk"This has two big implications. Firstly, the system is rapidly adaptable, and this is quite important for application in various situations. The cochlea's bio-inspired properties also help to highlight important information like when a sound started or specific tones, which should help to make the processing faster and more efficient .
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