Hyundai Motor Factory – Chennai, Tamil Nadu
Case Study: Hyundai Motor Factory – Chennai, Tamil Nadu
Design and Supply of Anechoic Chamber Foam Wedges for Automotive Acoustic Testing
Project Overview
Client:
Hyundai Motor India
Location:
Chennai, Tamil Nadu
Scope:
Design and supply of anechoic chamber foam wedges for automotive testing.
Area Covered:
180 m²
Objective:
Create a 100% quiet environment suitable for precision car noise, vibration, and harshness (NVH) testing.
Acoustic Challenges
1
Automotive NVH Testing Requirement: Chamber needed full sound absorption to analyze engine, cabin, and component noise without reflection interference.
2
Strict Performance Standard: Targeting absolute free-field conditions (RT60 near zero) for high-accuracy automotive testing.
3
Large-Scale Wedge Design: Deep wedge profile required to absorb low-frequency sound typical in vehicle acoustics.
Solutions Implemented by MMTPL
Anechoic Foam Wedges
Quantity & Area:
Installed across 180 m² of wall and ceiling surfaces.
Wedge Size:
900 x 300 x 750 mm (depth critical for low-frequency absorption).
Material:
High-density open-cell polyurethane foam, flame-retardant (ASTM E-84 Class A).
Performance::
NRC: 0.99 (near-total absorption).
Eliminated reflections for NVH testing precision in full automotive evaluations.
Chamber Design Features
100% Quiet Environment
Engineered for vehicle sound measurement without external interference.
Low-Frequency Control
Deep wedge profile attenuated frequencies as low as 80 Hz, suitable for car body and drivetrain testing.
Floating Floor
Decoupled grated flooring to avoid reflective surfaces, allowing technicians to stand at test points without disrupting chamber acoustics.
Results
Testing Conditions Achieved:
RT60 (Reverberation Time):
< 0.1 seconds, delivering true anechoic performance.
Zero reflection sound field allowed high-fidelity automotive noise analysis.
Compliance:
Met global automotive acoustic testing standards for OEM facilities.
Materials Summary
Anechoic Foam Wedges:
Size: 900 x 300 x 750 mm
NRC: 0.99 (anechoic-grade)
Flame Retardant: ASTM E-84 Class A
Coverage Area:
180 m² chamber surfaces (walls + ceiling).
Application:
Automotive NVH (Noise, Vibration, Harshness) testing chamber.
Significance of the Project
This anechoic chamber project demonstrates MMTPL’s ability to design and deliver precision-engineered acoustic solutions for the automotive industry, ensuring quiet, reflection-free environments essential for advanced NVH research and product development