The article “Exploring cultural heritage through acoustic digital reconstructions” by Brian Katz, Damian Murphy, and Angelo Farina (Physics Today, December 2020, page 32) gives an excellent review of the state art in computer simulation room acoustics. However, authors seem unfamiliar with revolution concert-hall, theater, worship-space design that started Peter Parkin J. H. Taylor’s work Londo...

background: microwave thermotherapy has been gradually used in radiotherapy and it is reported that microwave radiation increases bone demineralization rate independently of temperature. furthermore, it becomes more and more widespread that the damage caused by the synergistic effect of microwave radiation and hypergravity. the experiment was designed to investigate the effect of microwave radi...

In these days, Discriminative Training (DT) methods of an acoustics model are taking over the leadership in the speaker recognition task for training an acoustics model. Maximum Likelihood (ML) training suffers from some inaccuracies because of improper assumptions of the suitability of the HMM. Well-known adaptation method, feature Maximum Likelihood Linear Regression (fMLLR), is based on ML c...

*Fellow of the International Institute of Acoustics and Vibration, Author for correspondence: Email address: [email protected] 1 Three-Dimensional Acoustic Analysis of an Elliptical Chamber Muffler with a Side Inlet and a Side Outlet A. Mimani and M.L. Munjal* Facility for Research in Technical Acoustics (FRITA), Department of Mechanical Engineering, Indian Institute of Science, Ba...

In this paper, a method is presented for modeling sound propagation in rooms using a signal processing approach. Low order digital filters are designed to match to sound propagation transfer functions calculated from boundary material and air absorption data. The technique is applied to low frequency, finite difference time domain (FDTD) simulation of room acoustics and to real-time image-sourc...

PURPOSE The authors evaluated the installation and use of sound-field systems to investigate the impact of these systems on teaching and learning in elementary school classrooms. Methods The evaluation included acoustic surveys of classrooms, questionnaire surveys of students and teachers, and experimental testing of students with and without the use of sound-field systems. In this article, th...

Lithium niobate (LNO) is a well established material for surface acoustic wave (SAW) devices including resonators, delay lines and filters. Recently, multi-layer substrates based on LNO thin films have become commercially available. Here, we present systematic low-temperature study of the performance SAW fabricated LNO-on-insulator LNO-on-Silicon compare them to bulk devices. Our aims at assess...