Microscale Devices for Biomimetic Sound Source Localization: A Review

Intelligent speech technologies for transcription, disease diagnosis, and medical equipment interactive control in smart hospitals: A review

“…These issues bring challenges to the acquisition and processing of speech signals. We can upgrade the acquisition equipment for noise interference, such as using a microphone array, to suppress noise and acquire speech signals directionally [ 19 , 20 ]. In addition to noise suppression and collecting high-quality speech signals, the current research mainly focuses on their processing by state-of-the-art AI algorithms.…”

“…As illustrated in Fig. 27 , improving the adaptability of speech processing-based smart equipment in different medical scenarios is a top priority because most current medical speech recognition systems are vulnerable to noise interference in practical application scenarios [ 19 , 20 , 183 ]. We can use a multi-channel microphone array and noise reduction algorithm to improve the quality of collected sound.…”

“…We can use a multi-channel microphone array and noise reduction algorithm to improve the quality of collected sound. Therefore, speech noise reduction algorithms and sound source identification algorithms related to microphone arrays [ 20 ] are popular research directions. Moreover, designing lightweight deep learning models [ 237 ] and selecting more critical features [ 147 ] will improve the real-time performance, adaptability, and robustness of the voice system in some medical scenarios, such as wearable devices-based patient monitoring.…”

Dual Band MEMS Directional Acoustic Sensor for Near Resonance Operation

“…They can achieve accurate directional response relying on many different techniques and configurations and appropriate signal processing schemes [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. More recently, the reduced size, lightweight, and lower power requirements of MEMS-based directional acoustic sensors fostered interest in their development [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. Furthermore, the possibility of sound source localization by deploying a set of networked sensors make them even more attractive.…”

“…Furthermore, the possibility of sound source localization by deploying a set of networked sensors make them even more attractive. Most of the MEMS directional sensor designs are based on the configuration of the hearing mechanism of the Ormia ochracea fly [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. The fly’s hearing organ evolved to employ unique mechanically coupled eardrums that results in remarkable directional sound sensitivity, regardless of their small subwavelength eardrum separation [ 39 , 40 ].…”