Flow induced pulsations in resonant pipe networks with closed branches are considered in
this review paper. These pulsations, observed in many technical applications, have been …

Noise barriers are widely adopted to control environmental noise, but their performance may
be decreased by the too reflective surface of their material. The noise is reflected back …

In this paper, we present the phenomenon of acoustically induced transparency (AIT) and
Fano resonances in one-dimensional parallel guides and symmetric/asymmetric resonators …

This paper describes a measurement method to characterise the low-frequency
aeroacoustic properties of ventilation extraction and supply valves based on an active two …

Since the introduction of microperforated (MP) sound absorption elements more than 40
years ago many variations of noise control devices from room acoustics to induct …

A new environmentally friendly sound absorbing material designed for vehicle noise
absorption and insulation applications is presented and its acoustic properties are studied in …

An experimental study is presented on the characterization of the noise transmission
properties of the duct junctions used in ventilation and air-conditioning air circuits, assumed …

Abstract Series impedances, including source and transfer impedances, are commonly used
to model a variety of noise sources and noise treatment elements in duct systems. Particle …

The source in an intake/exhaust system is commonly modeled as a source strength and
impedance combination. Both the strength and impedance are normally measured and …

A common method to characterize linear time invariant ducted acoustic sources is the
electro-acoustic analogy. The sources are typically defined by their internal source strength …