Changes in mass loading on the surface of acoustic biosensors result in output frequency shifts which provide precise measurements of analytes. Therefore, to detect a particular biomarker, the sensor delay path must be judiciously designed to maximize sensitivity and specificity. B-cell lymphoma 2 protein (Bcl-2) found in urine is under investigation as a biomarker for non-invasive early detect...

Thickness detection of concrete pavement is a critical step in construction completion acceptance and serves as an important metric for subsequent performance evaluations. The crux thickness evaluation lies determining the interface reflection echo propagation sound time. Based on acoustic impedance difference between surface layer contact layer, can be classified into two types: large-differen...

AN OPTIC FIBER SENSOR FOR PARTIAL DISCHARGE ACOUSTIC DETECTION by Xiaodong Wang Partial discharge (PD) is a very common problem in operating power transformers and is one of the factors that could lead to failure of power transformers, leading to power outage and expensive repairs. The acoustic wave induced by PD can be measured and used for monitoring, diagnosing, and locating potential failur...

introduction when a liquid is irradiated with high-intensity and low-frequency ultrasound, acoustic cavitation occurs and there are some methods to determine and quantify this phenomenon. the existing methods for performing these experiments include sonochemiluminescence (scl) and chemical dosimetric methods. the particles in a liquid decrease the ultrasonic intensity threshold needed for cavit...

This paper proposes an acoustic event detection (AED) method using semi-supervised non-negative matrix factorization (NMF) with a mixture of local dictionaries (MLD). The proposed method based on semi-supervised NMF newly introduces a noise dictionary and a noise activation matrix both dedicated to unknown acoustic atoms which are not included in the MLD. Because unknown acoustic atoms are bett...

Abstract Many speech processing systems struggle in conditions with low signal-to-noise ratios and changing acoustic environments. Adaptation at the transduction level integrated signal could help to address this; human hearing, are can be adaptively tuned for noisy conditions. Here we report a microelectromechanical cochlea as bio-inspired sensor functionality. Real-time feedback is used tune ...