Acoustic silencer software

The measurement results are directly applied to the customized computation model. These adjustments are specific to your fabrication granting you exclusive access to them.

Questions and comments? Sound absorption meter AcoustiAdrienne. This website uses cookies. By continuing to use the website, you agree to the use of cookies. Fundamentals and Applications to Mufflers and Silencers. How is sound generated and transmitted in ducts? This question is studied in duct acoustics, a branch of acoustics. Why do we study duct acoustics?

I hope that this post will complement my recent book Duct Acoustics for the answer. According to the archeological findings, history of duct acoustics is as old as human history. We may imagine it to have begun when a Stone Age human discovered that impressive sounds could be produced by buzzing into a hollowed-out animal horn, which is a non-uniform duct in technical terminology.

This revolutionary discovery propagated over the planet, invoking the curiosity of our ancestors for the explanation of the phenomenon, and starting a never-ending period of research and development. Next breakthrough came when craftsmen had the idea of making prototypes of animal horns from the materials available in their times, such as wood, clay, ivory, or metal. This capability enabled them to test various duct shapes. They thus learned that impressive sounds could also be generated by blowing into manmade ducts not necessarily of the shape of an animal horn.

Hence forerunners of the modern wind instruments were invented. Figure 1 shows the oldest surviving example. We see similar trumpets in varying lengths, sizes and shapes played in all continents in ceremonies and wars.

Beginning with Renaissance, trumpets began to be used for making music and hence evolved the modern trumpet, which is characterized by its bent tube and valve mechanism which the player uses to vary the tube length so that the chromatic scale is played evenly Figure 2a. In some Baroque trumpets, fingerholes are provided to get a similar effect; however, blowing into tubes with holes is generally considered to be the distinctive feature of wind instruments of the flute or clarinet type, the former having an as long history stream as the trumpet and was known in various forms and names in many ancient cultures Figure 2b.

The program provides you with a complete eight-octave band acoustical analysis. It is a true, model-all program. Multi-layered graphical user interface for constructing block diagram models of flow duct networks with multiple sources and outlets; block diagrams can be linked to a drawing or a sketch of the system. Open end radiation into fractional free-fields and diffuse fields. Signal analyzer for driving sources, audio play, and post-processing of results or measured signals.

User-friendly input datasheets with formula writing, syntax and compatibility checking capabilities.