Concept study of sustainable noise control solution for HVAC systems based on microperforated elements

Recently fibreless solutions have become a trend in the design of sustainable and environmentally friendly duct silencers. In this respect microperforated panels have been proved to provide adequate performance for the substitution of unfavourable fibrous material layers commonly used in mass-produc...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Jüri Lavrentjev, Hans Rämmal, Margus Villau
Formato: article
Lenguaje:EN
Publicado: Estonian Academy Publishers 2021
Materias:
Q
Acceso en línea:https://doaj.org/article/aa609109e3df42b29f9deaa79a5dd30a
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
Descripción
Sumario:Recently fibreless solutions have become a trend in the design of sustainable and environmentally friendly duct silencers. In this respect microperforated panels have been proved to provide adequate performance for the substitution of unfavourable fibrous material layers commonly used in mass-produced silencers. This paper presents an acoustic study of microperforated elements aimed for effective and eco-friendly noise control solutions. Several microperforated sheet metal panels have been experimentally tested in a variety of layered configurations to maximize the sound absorption coefficient in the expected operational frequency range. The optimal solutions have been implemented in the design of novel fibreless solutions, presented in this research, and compared with typical fibrous material filled units commercially available. The results of the study demonstrate the appropriateness of the double-layered microperforates for a duct silencer application as well as for a variety of NVH (noise, vibration, and harshness) imple­- mentations where potent noise absorption is aimed for.