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 Acoustics 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 Acoustics 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.
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. - Validation
Onsite validation to confirm system performance. - Timeline
Typical projects range from 4–12 weeks depending on complexity.
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.
The Memtech Difference
At Memtech, noise is our business. Our engineers oversee every step, 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 certified 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
Noise measurements, analysis, modeling and installation support are overseen by professionals who understand acoustic theory, as well as the implementation of practical solutions.
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 are provided with complete documentation, delivered in easy-to-understand language with accurate data and comprehensive drawings.
*Shipping available across the continental USA, and international; 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?
An anechoic chamber absorbs sound on all six interior surfaces (walls, ceiling, and floor) to simulate a true free-field acoustic environment. A hemi-anechoic chamber uses the same absorptive treatment on walls and ceiling but retains a hard, reflective floor to simulate free-field conditions above a reflecting plane. Memtech Acoustics designs both types, selecting the configuration based on the test standard, equipment size, and measurement objective.
How low can the cutoff frequency be in an anechoic chamber?
The cutoff frequency is determined by chamber volume and wedge depth. Deeper wedges and larger chambers achieve lower cutoff frequencies. Memtech Acoustics designs chambers to meet project-specific low-frequency performance requirements, with wedge geometry optimized for the target cutoff and applicable test standard.
Are Memtech Acoustics chambers custom or modular?
Memtech Acoustics chambers are engineered per application. While modular structural elements may be used for efficiency, acoustic performance is always driven by custom design tailored to the project's cutoff frequency, isolation requirements, and physical constraints.
Can anechoic chambers be installed in existing buildings?
Yes. Memtech Acoustics regularly installs anechoic and hemi-anechoic chambers within existing structures. These installations require careful coordination of structural loading, vibration isolation, equipment access, and building envelope constraints to achieve the required acoustic performance.
Does Memtech Acoustics provide verification testing for anechoic chambers?
Yes. Memtech Acoustics performs post-installation acoustic verification to confirm that chamber performance meets design targets and applicable standards, including ISO 3745, ANSI S12.19, and project-specific specifications.
Can anechoic chambers support large or heavy equipment?
Yes. Hemi-anechoic chambers from Memtech Acoustics are specifically designed with reinforced structural floors to support vehicles, heavy machinery, and industrial equipment. Floor load capacity, equipment access paths, and turntable integration are all engineered into the chamber design from the outset.
What is the typical lead time for an anechoic chamber project?
Lead times depend on chamber size, wedge configuration, and project complexity. Contact Memtech Acoustics for project-specific lead time estimates at (248) 289-1123 or sales@memtechacoustics.com
Let’s Engineer the Right Solution, Together.
Let's Get Started. Contact Us.
Talk to our experts. We’ll assess your needs and recommend a solution that works for your project.
