Abstraçt A revicw of tlhe efects of ambient noisc and rcverberation on speech intelligibility in
classrooms has been completed because of the long-standing luck» f agreement on …

Este livro aborda os princípios para a modelagem e caracterização da propagação do som
em ambientes, bem como os fundamentos para o desenvolvimento de projetos de recintos …

Of the many available reverberation time prediction formulas, Sabine's and Eyring's
equations are still widely used. The assumptions of homogeneity and isotropy of sound …

In this work, composite materials made of adhesive mortar and scrap tire rubber particles
were investigated with the main aim of characterizing their airborne noise insulation …

Historically, two equations have been used for predicting reverberation times, Sabine and
Eyring. A precise means is presented for determining Eyring absorption coefficients α eyring …

This work deals with the improvement of the room acoustic quality of two medium sized
meeting rooms through the investigation of the optimal placement of absorption and diffusive …

A room's acoustic properties are a product of the room's geometry, the objects within the
room, and their specific positions. A room's acoustic properties can be characterized by its …

The reverberation of a room is often controlled by installing sound absorption panels to the
ceiling and on the walls. The reduced reverberation is particularly important in classrooms to …

This paper presents a comparison between measured and calculated acoustical parameters
in eight high school classrooms. The mid frequency unoccupied and occupied reverberation …

Sound absorbing micro-perforated panels (MPPs) are being increasingly used because of
their high quality in terms of hygiene, sustainability and durability. The present work …