Work

Wall-applicable metamaterial: mitigating resonance dip for enhanced sound transmission loss

Year: 2024

Type: conference-paper

Abstract: In recent years, there has been a significant advancement in thermal insulation technology, allowing for the implementation of energy-efficient solutions in existing buildings while preserving their architectural and cultural significance. This recognition has led to the widespread adoption of External Thermal Insulation Composite Systems (ETICS). However, this brings the common challenge in acoustic engineering, the resonance dip, into the spotlight. When the frequency of an incident sound wave coincides with a mass-spring-mass resonance of the thermally insulated wall, the sound insulation drop occurs, possibly resulting in a reduction in transmission losses. This study introduces a wall-applicable design of Plate-type Acoustic Metamaterial (PAM) to effectively enhance sound transmission loss. We investigated in development a transfer matrix method combined with the effective mass density of PAM to model the ideal metamaterial wall and further compared it with the results based on mass-law methods. Design strategies to construct the ideal bandgap were developed by analyzing dispersion curves.

Source: NOISE-CON proceedings

DOI: 10.3397/in_2024_3920

Authors: Rui ZENG, Elke DECKERS, Christ GLORIEUX, Daniel URBáN, Bartosz CHMIELEWSKI

Institutions: Slovak University of Technology in Bratislava, KU Leuven, TU Wien

Language: English

Topic: Acoustic Wave Phenomena Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, HORIZON EUROPE Framework Programme

Awards: G1817242253, G2053617462, G3836552374, G8359723208