Results 111 to 120 of about 60,931 (342)

Reverberation and Absorption [PDF]

The Journal of the Acoustical Society of America, 1937
We distinguish between geometrical and dynamical acoustics of rooms, which both have to be considered to obtain good quality of speech and music. Using a simple automatic method of recording the sound decay on an instrument with a logarithmic scale, concert and auditory rooms with and without audience are acoustically investigated ...
openaire   +2 more sources

Ischemic Myocardium Targeting Peptide‐Guided Nanobubbles for Multimodal Imaging and Treatment of Coronary Microvascular Dysfunction

Advanced Healthcare Materials, EarlyView.
Nanobubbles functionalized with indocyanine green and ischemic myocardium‐targeting peptide effectively target cardiomyocytes and enable the multimodal (fluorescence, ultrasonic, and photoacoustic) imaging of ischemic myocardium in mice with coronary microvascular dysfunction (CMD).
Bo Yu, Ziwei Pang, Jing Zhao, Jingyi Xue, Hsuan Lo, Tiancheng Gu, Ping Zhang, Jiawei Tian, Guo‐Qing Du   +8 more
wiley   +1 more source

Estimating Number of Speakers via Density-Based Clustering and Classification Decision

IEEE Access, 2019
It is crucial to robustly estimate the number of speakers (NoS) from the recorded audio mixtures in a reverberant environment. Some popular time-frequency (TF) methods approach this NoS estimation problem by assuming that only one of the speech ...
Junjie Yang, Yi Guo, Zuyuan Yang, Liu Yang, Shengli Xie   +4 more
doaj   +1 more source

Speech Dereverberation in the STFT Domain [PDF]

arXiv, 2015
Reverberation is damaging to both the quality and the intelligibility of a speech signal. We propose a novel single-channel method of dereverberation based on a linear filter in the Short Time Fourier Transform domain. Each enhanced frame is constructed from a linear sum of nearby frames based on the channel impulse response.
arxiv  

Black-Hole Mass Measurements [PDF]

, 2004
The applicability and apparent uncertainties of the techniques currently available for measuring or estimating black-hole masses in AGNs are briefly summarized.Comment: 6 pages.
Vestergaard, M.
core   +2 more sources

A Dual‐Layer Hydrogel Barrier Integrating Bio‐Adhesive and Anti‐Adhesive Properties Prevents Postoperative Abdominal Adhesions

Advanced Healthcare Materials, EarlyView.
A new dual‐layer hydrogel barrier for preventing postoperative abdominal adhesions is developed. The inner layer, consisting of polyethyleneimine (PEI) and thioctic acid (TA), enhanced adhesion to moist tissues. The outer layer combines zwitterionic, thermoresponsive hyaluronic acid with anti‐inflammatory epigallocatechin gallate (EGCG) and forms a ...
Mena Asha Krishnan, Olawale A. Alimi, Mitchell Kuss, Tiffany N Razabdouski, Erika A Eksioglu, Bin Duan, Bo Liu   +6 more
wiley   +1 more source

Enhancing Ultrasound Power Transfer: Efficiency, Acoustics, and Future Directions

Advanced Materials, EarlyView.
Implantable devices significantly enhance healthcare but are limited by battery life. Ultrasound power transfer technology offers a promising solution for sustainable operation. This review addresses gaps in current research, particularly in sound field analysis and energy efficiency optimization.
Yi Zheng, Zhuomin Zhang, Yanhu Zhang, Qiqi Pan, Xiaodong Yan, Xuemu Li, Zhengbao Yang   +6 more
wiley   +1 more source

A three-dimensional bistatic reverberation model of underwater explosion by interface scattering at variable sound speeds

Journal of Low Frequency Noise, Vibration and Active Control, 2019
Underwater reverberation is a main limitation of the sonar performance and thereby the reverberation level estimation becomes crucial. In this study, based on the Lambert law and ray theory, a model for predicting 3D bistatic reverberation performance by
Guo Rui, Lei Liu, Sheng Zhen-Xin, Song Pu   +3 more
doaj   +1 more source

Reverberation impairs brainstem temporal representations of voiced vowel sounds: challenging periodicity-tagged segregation of competing speech in rooms

Frontiers in Systems Neuroscience, 2015
The auditory system typically processes information from concurrently active sound sources (e.g., two voices speaking at once), in the presence of multiple delayed, attenuated and distorted sound-wave reflections (reverberation).
Mark eSayles, Mark eSayles, Arkadiusz eStasiak, Ian Michael Winter   +3 more
doaj   +1 more source

Advances in Reverberation Mapping [PDF]

arXiv, 2007
This contribution briefly reviews the reverberation mapping technique which leads to determination of black hole masses. I focus on the emerging relation between the broad-line region size and the active galactic nucleus (AGN) luminosity, and on an overview of recent results of reverberation mapping studies which are starting to cover the full AGN ...
arxiv