Anechoic and hemi-anechoic chambers
Acoustic Chambers for Product Development and Validation
Engineered test environments supporting automotive, industrial, aerospace, and electronics testing.
Test Chambers That Support Product Development
Anechoic and hemi-anechoic chambers are highly controlled acoustic test environments designed to eliminate sound reflections and external noise, allowing engineers to measure sound and vibration behavior with exceptional accuracy. These chambers simulate free-field conditions, enabling precise testing of sound power, directivity, vibration response, and noise emissions.
Memtech designs and delivers custom anechoic and hemi-anechoic chambers tailored to each client’s testing requirements, space constraints, and applicable standards. Our solutions support product development, compliance testing, research, and validation across industrial, automotive, aerospace, electronics, and academic environments.
Memtech designs and delivers custom anechoic and hemi-anechoic chambers tailored to each client’s testing requirements, space constraints, and applicable standards. Our solutions support product development, compliance testing, research, and validation across industrial, automotive, aerospace, electronics, and academic environments.
Each chamber is engineered based on specific performance requirements, including:
- Target cutoff frequency
- Required test volume and payload capacity
- Applicable acoustic standards (ISO, ANSI, IEC, MIL-STD)
- Background noise criteria
- Structural and vibration isolation needs
- Access, lighting, ventilation, and safety integration
Key Applications
Sound Power Testing
Controlled environments for accurate measurement of sound power, spectra, and vibration behavior.
Automotive NVH Development
Free-field testing for vehicles, components, and subsystems across development and validation stages.
Industrial Machinery & Equipment
Noise characterization of motors, compressors, appliances, and production equipment.
Aerospace & Defense Testing
Precision acoustic environments for avionics, components, and defense-related systems.
Research & Development Labs
Repeatable acoustic conditions supporting innovation, prototyping, and performance optimization.
Regulatory & Compliance Testing
Testing aligned with ISO, ANSI, IEC, and other industry standards.
Anechoic and hemi-anechoic chambers
Anechoic & Hemi-Anechoic Chambers
Anechoic chambers feature full sound absorption on all interior surfaces, including walls, ceiling, and floor. This configuration creates a true free-field environment where sound propagates without reflections.
Hemi-anechoic chambers combine fully absorptive walls and ceiling with a reflective, load-bearing floor, simulating free-field conditions above a reflective plane. This configuration is often required by industry test standards for large or floor-mounted equipment.
Anechoic chambers achieve reflection-free environments using high-performance sound-absorbing wedges engineered to absorb sound energy across a defined frequency range. Chamber geometry, wedge depth, and structural isolation are carefully designed to achieve the desired cutoff frequency, below which free-field conditions are maintained.
To prevent external noise and vibration from contaminating measurements, chambers are typically constructed as room-within-a-room systems, incorporating structural isolation, floating floors (where required), and acoustically sealed penetrations.
Hemi-anechoic chambers combine fully absorptive walls and ceiling with a reflective, load-bearing floor, simulating free-field conditions above a reflective plane. This configuration is often required by industry test standards for large or floor-mounted equipment.
Anechoic chambers achieve reflection-free environments using high-performance sound-absorbing wedges engineered to absorb sound energy across a defined frequency range. Chamber geometry, wedge depth, and structural isolation are carefully designed to achieve the desired cutoff frequency, below which free-field conditions are maintained.
To prevent external noise and vibration from contaminating measurements, chambers are typically constructed as room-within-a-room systems, incorporating structural isolation, floating floors (where required), and acoustically sealed penetrations.
Technical Highlights
Critical design features that enable controlled free-field conditions and standards-based testing.
Free-Field Performance to Target Cutoff Frequencies
Engineered chamber dimensions and absorber depths deliver predictable free-field behavior across the required frequency range.
Custom Wedge Geometry & Broadband Absorption
Absorber wedge profiles and materials are tailored to achieve consistent absorption from low to high frequencies.
Room-Within-a-Room Structural Isolation
Independent structural systems prevent external noise and vibration from contaminating sensitive measurements.
Load-Bearing Reflective Floors (Hemi-Anechoic)
Structurally designed floors support heavy equipment while maintaining free-field conditions above the plane.
Precision Acoustic Doors & Observation Windows
Specialty doors and glazing systems maintain airtight seals without compromising access or visibility.
Standards-Driven Chamber Design
Chambers are designed to meet applicable ISO, ANSI, IEC, and MIL-STD acoustic testing requirements.
These components are strategically selected and positioned using acoustic modeling to ensure optimal performance.
Lead Time &
Project Delivery
Every system is custom-designed and built-to-order, ensuring performance and compliance.
- Assessment
Acoustic analysis and engineering design. - Design & Fabrication
Systems built to spec using proven materials and methods. - Installation
Turnkey or partnered installation services. - Commissioning
Onsite validation to confirm system performance. - Timeline
Typical projects range from 4–12 weeks depending on complexity.
The Memtech Difference
At Memtech, acoustics is what we do. Our engineers oversee every stage, ensuring that each project is properly delivered, on-time and within budget. This integrated approach delivers predictable results and protects your investment.
Certified and Licensed Professionals
Testing conducted by engineers and acoustic specialists, not general contractors or “safety consultants.”
National Standards Alignment
We follow OSHA 1910.95, NIOSH criteria, and ANSI S12.19-1996 methods for noise exposure assessment. Measurements are conducted via ISO procedures or per academically accepted methods.
Engineering Expertise
Your results are reviewed by professionals who understand both the physics and the audible consequences of the noise data.
High Responsiveness, Proven Reliability
We are your trusted local partner providing on-demand support and dependable project execution. Michigan-based with regional reach and national* shipping capabilities.
Confidential & Detailed Reporting
We don’t just submit a report. You get full documentation, delivered in easy-to-understand language with visuals and defensible insights you can act on.
*Shipping available across the continental USA; installations are offered in select regions.
NOTE: We do not stock custom products in our U.S. warehouse. Ask us about lead times for your project.
NOTE: We do not stock custom products in our U.S. warehouse. Ask us about lead times for your project.
Frequently Asked Questions (FAQs)
What is the difference between anechoic and hemi-anechoic chambers?
Anechoic chambers absorb sound on all surfaces, while hemi-anechoic chambers use a reflective floor to simulate free-field conditions above a plane, often required for large equipment testing.
How low can the cutoff frequency be?
The cutoff frequency depends on chamber size and wedge depth. Memtech designs chambers to meet project-specific low-frequency performance requirements.
Are these chambers custom or modular?
Memtech chambers are engineered per application. While modular elements may be used, performance is driven by custom design.
Can chambers be installed in existing buildings?
Yes. Many chambers are installed within existing structures, requiring careful coordination of load, vibration, access, and building constraints.
Do you provide verification testing?
Yes. Memtech performs post-installation acoustic verification to confirm chamber performance meets design targets and applicable standards.
Can chambers support large or heavy equipment?
Hemi-anechoic chambers are specifically designed with structural floors to support vehicles, machinery, and industrial equipment.
What’s the typical lead time for material supply?
We do not stock custom products in our U.S. warehouse. Ask us about lead times for your project by calling (248) 289-1123 or emailing us at sales@memtechacoustics.com
Let’s Engineer the Right Solution, Together.
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