NVH Test Chamber for Mobile Phone Testing Supplied to Foxconn | Noise & Vibration Analysis Room NVH Test Chamber
SomNandi Industries is proud to announce the successful design, manufacturing, and installation of a precision-engineered NVH (Noise, Vibration & Harshness) Test Chamber at Foxconn’s mobile phone manufacturing facility in India. This landmark project underscores SomNandi’s capability to deliver world-class acoustic testing infrastructure to global OEMs operating at the highest standards of quality and precision. The custom-built noise test chamber plays a critical role in Foxconn’s stringent quality control and R&D processes, enabling accurate, repeatable analysis of acoustic behavior in smartphones and mobile device components — from microphones and speakers to internal vibration signatures.
Why Foxconn Needed a Dedicated NVH Test Chamber
As mobile devices become more acoustically sophisticated — integrating noise-cancelling microphones, multi-driver speaker arrays, and haptic feedback systems — acoustic quality testing has evolved from a secondary check into a primary manufacturing imperative. Foxconn, one of the world’s largest electronics contract manufacturers, demands that every device leaving its production line meets precise acoustic benchmarks. Ambient noise from the factory floor, vibrations from machinery, and electromagnetic interference can all contaminate test results if testing is conducted in an uncontrolled environment. A purpose-built NVH test chamber eliminates these variables, ensuring that every acoustic measurement is reliable, repeatable, and traceable to international standards.Key Objectives of the NVH Test Chamber
The chamber was engineered around four core objectives:- Acoustic Isolation: Provide an ultra-low-noise internal environment with ambient sound pressure levels at or below ≤ 25 dBA — enabling accurate SPL (Sound Pressure Level) measurements and microphone sensitivity testing without interference from external noise sources.
- Vibration Control: Eliminate structure-borne vibrations from the production floor, HVAC systems, and surrounding machinery that could distort acoustic readings or damage sensitive calibration equipment.
- Echo Suppression: Line the interior with precision sound-absorbent materials tuned to the frequency ranges relevant to smartphone audio — typically 100 Hz to 20 kHz — to minimize reflections that could skew measurement data.
- Production Integration: Support seamless integration with Foxconn’s automated end-of-line (EOL) testing systems, enabling high-throughput acoustic quality checks without disrupting the manufacturing workflow.
NVH Test Chamber Technical Specifications & Highlights
The chamber was designed, fabricated, and installed by SomNandi’s in-house engineering team and incorporates the following key features:| Parameter | Specification |
| Internal Ambient Noise Level | ≤ 25 dBA |
| Construction | High-density modular acoustic panels |
| Mounting System | Vibration isolation mounts (floor, wall, ceiling) |
| Interior Lining | Broadband sound-absorbent wedge / foam lining |
| Frequency Optimization | Tuned for smartphone audio range (100 Hz – 20 kHz) |
| Instrumentation Access | Integrated cable feed-throughs and port glands |
| Lighting | Low-noise LED lighting with acoustic-sealed fixtures |
| Ventilation | Silenced HVAC with zero acoustic leakage |
| Standards Compliance | IEC 60268 / IEC 61094 electroacoustic testing guidelines |
Modular Acoustic Panel Construction
The chamber walls, floor, and ceiling are constructed from high-density composite acoustic panels featuring a multi-layer build-up of mass-loaded vinyl, mineral wool infill, and perforated steel facings. The modular design allows for future reconfiguration or relocation of the chamber without structural modification to the facility.Vibration Isolation System
The entire chamber structure rests on a system of anti-vibration mounts that mechanically decouple it from the factory floor slab. This prevents low-frequency vibration energy — a common source of measurement error in production environments — from transmitting into the test space.Interior Acoustic Treatment
The interior surfaces are finished with custom-cut sound-absorbent foam panels optimized for the frequency range critical to mobile device acoustic testing. This treatment ensures a near free-field environment within the chamber, eliminating flutter echoes and standing waves that would otherwise distort microphone and speaker measurements.Instrumentation Integration
Dedicated cable feed-through ports allow test instrumentation cables, power lines, and data connections to pass through the chamber wall without creating acoustic leaks. The chamber also integrates low-noise LED lighting and a silenced ventilation system that maintains a comfortable internal temperature during extended testing sessions without introducing measurable noise into the test environment.Compliance & Standards
The NVH test chamber was designed and built in accordance with internationally recognised electroacoustic testing standards, including:- IEC 60268 – Sound system equipment: electroacoustic measurement methodology
- IEC 61094 – Measurement microphones
- ISO 3745 – Acoustics: determination of sound power levels in anechoic and hemi-anechoic rooms
Significance for India’s Electronics Manufacturing Ecosystem
This installation marks a significant milestone — not just for SomNandi Industries, but for India’s rapidly growing advanced electronics manufacturing sector. As global OEMs like Foxconn continue to expand their India-based manufacturing footprint under initiatives such as the PLI (Production Linked Incentive) Scheme for Mobile & Electronic Components, the demand for precision acoustic testing infrastructure is accelerating. NVH test chambers are no longer optional R&D assets — they are essential production floor infrastructure for any facility manufacturing premium-tier smartphones. SomNandi’s ability to design, manufacture, and install this chamber to international standards, within India, demonstrates that the country’s industrial engineering capability is keeping pace with the demands of world-class electronics manufacturing.Popular Acoustic & NVH Solutions by SomNandi Industries
SomNandi Industries provides a comprehensive portfolio of noise and vibration control solutions across industrial, infrastructure, and electronics sectors:- Soundproof Enclosures for Diesel Generators — Attenuate genset noise in residential, commercial, and industrial environments
- Gas Turbine Acoustic Enclosures — High-temperature rated enclosures for power generation assets
- Industrial Noise Control Solutions — End-to-end noise mapping and mitigation for factories and process plants
- NVH Test Chambers for Automotive Applications — Semi-anechoic and anechoic rooms for vehicle NVH testing
- Acoustic Louvers for Chiller Noise Control — Attenuate HVAC and chiller noise without restricting airflow
- RF Shielded Chambers for EMC Testing — Faraday cage rooms for electromagnetic compatibility testing
- Blast Resistant Doors for Critical Infrastructure — Pressure-rated acoustic doors for power plants, defence, and oil & gas
- Portable Soundproof Booths & Test Cabins — Compact, relocatable acoustic enclosures for R&D and QC labs
- Noise Barriers for Highways and Metro Lines — Absorptive and reflective barriers for traffic and rail noise management
- Custom Acoustic Panels for OEM Integration — Bespoke panel solutions for machine enclosures and ceilings
- Sound Attenuators for HVAC Systems — Duct silencers engineered to reduce fan and airflow noise in ventilation systems
Partner with SomNandi for Your NVH Testing Requirements
Whether you are an electronics OEM establishing a new production line, an automotive manufacturer upgrading your NVH lab, or a test equipment provider seeking a certified acoustic space, SomNandi Industries has the engineering expertise and manufacturing capability to deliver a solution tailored to your specifications. Contact SomNandi Industries to discuss your NVH test chamber or acoustic enclosure requirements.FAQs - Frequently Asked Questions
What is an NVH Test Chamber and why is it essential for mobile phone manufacturing?
An NVH Test Chamber is a precision acoustic enclosure that provides an ultra-low-noise, vibration-free environment for testing smartphones. It eliminates ambient factory noise and reflections that contaminate acoustic measurements, ensuring microphone sensitivity, speaker output, and SPL readings are accurate, repeatable, and reliable across every device on the production line.
What internal ambient noise level does SomNandi's NVH Test Chamber achieve?
SomNandi’s NVH Test Chamber achieves an internal ambient noise level of ≤ 25 dBA. This is accomplished through high-density modular acoustic panels, mass-loaded vinyl wall construction, vibration isolation mounts, silenced ventilation, and low-noise LED lighting — ensuring the internal environment never compromises sensitive microphone or speaker measurements.
Which international standards does the SomNandi NVH Test Chamber comply with?
The chamber complies with IEC 60268 (electroacoustic measurement), IEC 61094 (measurement microphones), and ISO 3745 (anechoic room acoustics). Compliance ensures all test data generated is valid, reproducible, and internationally recognised — making it suitable for product certification, regulatory submissions, and R&D documentation across global markets.
Can the NVH Test Chamber integrate with automated end-of-line production testing systems?
Yes. The chamber features dedicated cable feed-through ports and instrument glands that allow test cables, power, and data connections to pass through the acoustic wall without sound leakage. This enables seamless integration with automated EOL testing systems without disrupting production line cycle times or workflow.
Is the NVH Test Chamber suitable for applications beyond mobile phone testing?
Yes. SomNandi’s NVH chambers serve automotive, consumer electronics, home appliances, defence, and aerospace industries. Each chamber is custom-engineered to the client’s specific noise floor requirement, frequency range, dimensions, and production workflow — making it a versatile acoustic testing solution across multiple sectors and applications.
