Results 11 to 20 of about 6,705 (186)

Non-Invasive Monitoring of Human Health by Photoacoustic Spectroscopy

Sensors, 2022
For certain diseases, the continuous long-term monitoring of the physiological condition is crucial. Therefore, non-invasive monitoring methods have attracted widespread attention in health care.
Yongyong Jin, Yonggang Yin, Chiye Li, Hongying Liu, Junhui Shi   +4 more
doaj   +3 more sources

Applications of Near Infrared Photoacoustic Spectroscopy for Analysis of Human Respiration: A Review

Molecules, 2020
In this review, applications of near-infrared photoacoustic spectroscopy are presented as an opportunity to evaluate human respiration because the measurement of breath is fast, intact and simple to implement.
Dan C. Dumitras, Mioara Petrus, Ana-Maria Bratu, Cristina Popa   +3 more
doaj   +3 more sources

Dual-comb photoacoustic spectroscopy [PDF]

Nature Communications, 2020
Spectrally resolved photoacoustic images often require the acquisition of data for each wavelength separately. Here, the authors use dual frequency-comb spectroscopy for photoacoustic measurements, enabling spectrally resolved measurements without the ...
Jacob T. Friedlein, Esther Baumann, Kimberly A. Briggman, Gabriel M. Colacion, Fabrizio R. Giorgetta, Aaron M. Goldfain, Daniel I. Herman, Eli V. Hoenig, Jeeseong Hwang, Nathan R. Newbury, Edgar F. Perez, Christopher S. Yung, Ian Coddington, Kevin C. Cossel   +13 more
doaj   +3 more sources

High performance filtering and high-sensitivity concentration retrieval of methane in photoacoustic spectroscopy utilizing deep learning residual networks. [PDF]

Photoacoustics
A novel method is introduced to improve the detection performance of photoacoustic spectroscopy for trace gas detection. For effectively suppressing various types of noise, this method integrates photoacoustic spectroscopy with residual networks model ...
Cao Y, Li Y, Fu W, Cheng G, Tian X, Wang J, Zha S, Wang J.   +7 more
europepmc   +2 more sources

Cantilever-enhanced dual-comb photoacoustic spectroscopy. [PDF]

Photoacoustics
Dual-comb photoacoustic spectroscopy (DC-PAS) advances spectral measurements by offering high-sensitivity and compact size in a wavelength-independent manner.
Wang J, Wu H, Liu X, Wang G, Wang Y, Feng C, Cui R, Gong Z, Dong L.   +8 more
europepmc   +2 more sources

Lithium Niobate - Enhanced Photoacoustic Spectroscopy. [PDF]

Photoacoustics
In this work, we report on the novel employment of lithium niobate tuning forks as acoustic transducers in photoacoustic spectroscopy for gas sensing. The lithium niobate tuning fork (LiNTF) exhibits a fundamental resonance frequency of 39196.6 Hz and a ...
Cantatore AFP, Menduni G, Zifarelli A, Patimisco P, Gonzalez M, Seren HR, Spagnolo V, Sampaolo A.   +7 more
europepmc   +2 more sources

Online Detection of Hydrogen Fluoride under Corona Discharge in Gas-Insulated Switchgear Based on Photoacoustic Spectroscopy. [PDF]

Sensors (Basel)
Internal discharge and overheating faults in sulfur hexafluoride (SF6) gas-insulated electrical equipment will generate a series of characteristic gas products.
Wan L, Zhao X, Li K.
europepmc   +2 more sources

Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy. [PDF]

Light Sci Appl
The extension of dual-comb spectroscopy (DCS) to all wavelengths of light along with its ability to provide ultra-large dynamic range and ultra-high spectral resolution, renders it extremely useful for a diverse array of applications in physics ...
Wang J, Wu H, Sampaolo A, Patimisco P, Spagnolo V, Jia S, Dong L.   +6 more
europepmc   +2 more sources

Mass-specific optical absorption coefficients and imaginary part of the complex refractive indices of mineral dust components measured by a multi-wavelength photoacoustic spectrometer [PDF]

Atmospheric Measurement Techniques, 2015
Mass-specific optical absorption coefficients (MACs) and the imaginary part (κ) of the refractive indices of various mineral dust components including silicate clays (illite, kaolin and bentonite), oxides (quartz, hematite and rutile), and ...
N. Utry, T. Ajtai, M. Pintér, E. Tombácz, E. Illés, Z. Bozóki, G. Szabó   +6 more
doaj   +1 more source

Study on neural network algorithm for detecting respirable dust in photoacoustic cavity

AIP Advances, 2021
The traditional photoacoustic cavity has the advantages of simple structure, low cost, and easy integration with optical cavity technology, so it has significant advantages in the measurement of the optical characteristics of respirable dust. In order to
Huawei Jin, Ping Luo, Juan Dou, Huachun Bai   +3 more
doaj   +1 more source