Results 41 to 50 of about 324,266 (197)
Receive-Noise Analysis of Capacitive Micromachined Ultrasonic Transducers [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2016 This paper presents an analysis of thermal (Johnson) noise received from the radiation medium by otherwise noiseless capacitive micromachined ultrasonic transducer (CMUT) membranes operating in their fundamental resonance mode. Determination of thermal noise received by multiple numbers of transducers or a transducer array requires the assessment of ...
Ayhan Bozkurt, G. Goksenin Yaralioglu
openaire +3 more sources
Thermal-Mechanical Noise Modeling and Measurements of a Row-Column Addressed CMUT Probe
IEEE Open Journal of Ultrasonics, Ferroelectrics, and Frequency Control, 2022 Thermal-Mechanical (T-M) noise is a natural phenomenon occurring in Capacitive Micromachined Ultrasonic Transducers (CMUT). T-M noise is a value of great interest because it is linked to the minimal detectable pressure of a transducer and can also serve ...
Tony Merrien +2 more
doaj +1 more source
Capacitive Micromachined Ultrasonic Transducers for Therapeutic Ultrasound Applications [PDF]
IEEE Transactions on Biomedical Engineering, 2010 Therapeutic ultrasound guided by MRI is a noninvasive treatment that potentially reduces mortality, lowers medical costs, and widens accessibility of treatments for patients. Recent developments in the design and fabrication of capacitive micromachined ultrasonic transducers (CMUTs) have made them competitive with piezoelectric transducers for use in ...
Serena H. Wong +4 more
openaire +2 more sources
Radiation impedance of collapsed capacitive micromachined ultrasonic transducers [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2012 The radiation impedance of a capacitive micromachined ultrasonic transducer (CMUT) array is a critical parameter to achieve high performance. In this paper, we present a calculation of the radiation impedance of collapsed, clamped, circular CMUTs both analytically and using finite element method (FEM) simulations.
Ozgurluk, A. +3 more
openaire +5 more sources
A new detection method for capacitive micromachined ultrasonic transducers [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2001 Capacitive micromachined ultrasonic transducers (cMUT) have become an alternative to piezoelectric transducers in the past few years. They consist of many small circular membranes that are connected in parallel. In this work, we report a new detection method for cMUTs.
Ergun, A. S. +3 more
openaire +6 more sources
Deep-collapse operation of capacitive micromachined ultrasonic transducers [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2011 Capacitive micromachined ultrasonic transducers (CMUTs) have been introduced as a promising technology for ultrasound imaging and therapeutic ultrasound applications which require high transmitted pressures for increased penetration, high signal-to-noise ratio, and fast heating. However, output power limitation of CMUTs compared with piezoelectrics has
Olcum, S. +3 more
openaire +5 more sources
Prototype MEMS Capacitive Pressure Sensor Design and Manufacturing. [PDF]
, 2013 This paper is intended to describe the design and manufacturing aspects of a simple micromachined capacitive pressure sensor working in the pressure range of 0-1000 mbar. 500 µm thick Borofloat® 33 glass and silicon wafers were used as substrates.
Kulinyi, Sándor +3 more
core +1 more source
MOSAIC: A Scalable reconfigurable 2D array system for NDT [PDF]
, 2008 This paper documents the development of a scalable 2D array system, or Mosaic that can be targeted at a wide range of NDT applications by way of a reconfigurable tile that can be tessellated to form arrays of any size and shape.
Afroukh, F. +16 more
core +1 more source
An Investigation of Silica Aerogel to Reduce Acoustic Crosstalk in CMUT Arrays
Sensors, 2021 This paper presents a novel technique to reduce acoustic crosstalk in capacitive micromachined ultrasonic transducer (CMUT) arrays. The technique involves fabricating a thin layer of diisocyanate enhanced silica aerogel on the top surface of a CMUT array.
Varshitha Yashvanth, Sazzadur Chowdhury
doaj +1 more source
Nanotechnology and Precision Engineering, 2021 An air parametric array can generate a highly directional beam of audible sound in air, which has a wide range of applications in targeted audio delivery.
Xiaoli Zhang, Hui Zhang, Dachao Li
doaj +1 more source