When building an adaptive noise cancellation system for wideband acoustic signals, one can meet some difficulties in practical implementation of such a system. The major problem is related to the necessity using real-time signal generation and processing. In this paper active control which utilizes adaptation frequency domain considered. It shown that proposed algorithms simplify results comput...

A Helmholtz resonator with a curved cavity is studied for reducing jet-installation noise in configuration comprised by subsonic jet and nearby flat plate. The face-sheet are designed the Guess method impedance verified through an experiment simulation of tube. Both single double degree-of-freedom liners, latter perforated septum inside cavity, studied. good agreement obtained curves from desig...

Anthropogenic noise sources impact ecological processes by altering wildlife behavior and interactions with cascading impacts on community structure. The distribution magnitude of such has grown exponentially over the past century, now inundates even remote areas. Here we investigate biological responses to prolific, anthropogenic associated physical presence source (vehicle human voices) disco...

In this paper, an experimental investigation has been carried out on the acoustic characteristics of a compression ignition (CI) engine running with biodiesel blends under steady state operating conditions. The experiment was conducted on a four-cylinder, fourstroke, direct in jection and turbocharged diesel engine which runs with biodiesel (B50 and B100) and pure diesel. The signals of acousti...