Soundinsight BV articles

Summary

An evaluation of noise leakage in a vehicle cabin was conducted. Measurements were done with the Sonocat inside a moving car at an NVH test track. Figure 1 depicts the measuring rig (Sonocat device and software). Initially; discrete point measurements were executed to obtain preliminary acoustic data within the vehicle cabin and to familiarize with the acoustic environment. Subsequently, comprehensive scans were conducted across targeted interior regions suspe

Introduction

This document reports the in-situ sound absorption coefficients for different walls in the congregation hall of the Ernst-Christoffel-Haus in Monchengladbach-Rheydt. The measurements were performed in collaboration with Peutz Consult GmbH, Germany. The purpose of the measurements was to indicate how well the various surfaces absorb the sound in the room. The methods and measurement setup are presented in next section and the results are reported and co

Introduction

For the purpose of determining sound transmission from concert room 2 to room 1, Sonocat measurements were taken close to various sound-radiating surfaces in room 1. In these measurements, the sound intensity of that sound-radiating surface was determined. A constant loud sound source was used in room 2 for this purpose.

Introduction

The acoustic performance of noise barriers is determined by many parameters. In general minimum values for the absorption and insulation are prescribed. These minimum requirements are then tested on a sample of the barrier by laboratory measurements (EN1793-1 [1] and/or EN1793-2 [2]). In-situ testing of the requirements occurs rarely.

For the measurement of the sound absorption coefficient a large number of methods is available. These methods have in common that all of them rely on an overall sound Held model, i.e. a model that describes the whole sound field in front of the surface under investigation. Examples are the diffuse sound field model in the reverberation room method according to ISO 354 [ 1 ] and the plane wave model in the tube-based methods according to parts I and 2 of ISO 10534 [2, 3]. Whereas these methods