One of the most efficient, cost effective and widely used approaches to reduce the tonal signature of aeronautic engine noise is the so-called liners-structures located in the internal walls of the nacelle (the external structure of the motor) that form an acoustic treatment. In the research project called "Silent Aircraft", funded by FINEP and Emb

Promoting your link also lets your audience know that you are featured on a rapidly growing travel sitio. In addition, the more this page is used, the more we will promote Cobogo to other Inspirock users. Setup Your Trip Planning WidgetThe only way to get an objective measurement of sound levels is to use an SPL meter. (There are some inexpensive m

In this paper, the acoustic impedance of a liner is educed by a novel semi-analytical inverse technique. The liner sample is placed flush with the solid walls in a rectangular duct with grazing flow. The technique uses complex acoustic pressure measured at four positions at the wall of the duct, upstream and downstream of the lined section, and edu

Two walls of white Cobogó bricks blur the line between indoor and outdoor and create a dramatic light pattern to add interest to a sparse space at the Cobogó House in Sãeste Paulo, designed by Studio MK27.Put one of these on each vent connected to the studio ducts, even those in other rooms. If this isn't enough, you can add a second

Two walls of white Cobogó bricks blur the line between indoor and outdoor and create a dramatic light pattern to add interest to a sparse space at the Cobogó House in Sãeste Paulo, designed by Studio MK27.Promoting your link also lets your audience know that you are featured on a rapidly growing travel sitio. In addition, the more th