Free-Field Acoustic Environment
완전 무향실
Complete 6-wall wedge absorption system providing a true free-field acoustic environment above the design cut-off frequency. Engineered for transducer calibration, audio product certification, and precision NVH measurement.
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5 photos · click to enlarge기술 사양
Specifications are for preliminary project review only. Final parameters, materials, certificates, and acceptance criteria should be confirmed in the signed contract or approved technical proposal.
적용 분야
- Loudspeaker & transducer measurement
- Microphone calibration (IEC 61094)
- Headphone & hearing aid testing
- Automotive NVH component testing
- Consumer electronics certification
- Acoustic research & development
개요
A fully anechoic chamber eliminates all acoustic reflections through wedge-shaped absorbers installed on all six surfaces — walls, ceiling, and floor. The result is a free-field environment where sound propagates outward without boundaries, replicating an infinitely large outdoor space within a controlled laboratory setting.
HEMU Acoustics fully anechoic chambers are designed to achieve free-field conditions above the specified cut-off frequency (typically 80–100 Hz), with NRC values of 0.99 or higher. Our modular construction system enables chambers ranging from compact 5 m³ units for microphone calibration to large-scale 500+ m³ facilities for automotive component testing.
All chambers include an internal suspended wire floor grid for safe access, double-leaf wall construction for structural isolation, and an electromagnetic shielding option for EMC-sensitive applications.
Common applications include loudspeaker directivity measurements, headphone and microphone calibration, hearing aid testing, automotive component NVH characterization, and certification testing to IEC 60268-5, ISO 26101, and related standards.
주요 특징
Superior Free-Field Accuracy
Designed to meet or exceed the free-field deviation criterion of ±1.5 dB across the working area, ensuring measurement repeatability.
Modular Construction
Factory-prefabricated panels for fast on-site assembly. Standard modular units ship in 6–8 weeks; custom projects in 12–16 weeks.
Structural Vibration Isolation
Inner shell isolated from outer shell via spring mounts, achieving >40 dB insertion loss against floor-borne vibration.
Access & Safety
Suspended wire mesh floor grid rated to 250 kg/m². Emergency lighting, ventilation, and intercom included as standard.
Custom Absorber Design
Wedge geometry optimized via FEM simulation for your target cut-off frequency. Fiberglass, melamine foam, or hybrid wedge options.
Compliance Documentation
Full acoustic acceptance test report provided. Data includes insertion loss, background noise level, and free-field qualification map.
SEMrush 기반 적용 분야
적용 사례: 완전 무향실
실제 SEMrush US 데이터에서 3개의 롱테일 적용 사례를 선택하고 키워드, 검색량, CPC, KD, 의도 자료를 보관합니다.
Anechoic & Acoustic Test Chambers
Fully Anechoic Chamber Application Case for Fully Anechoic Chamber
SEMrush US (2026-06-14): "fully anechoic chamber" - volume 30/mo, $0.00 CPC, KD 0, intent N/A, source 20260614-fully-anechoic-chamber-us-exact.csv
사례 읽기
Anechoic & Acoustic Test Chambers
Anechoic Chamber Price Application Case for Fully Anechoic Chamber
SEMrush US (2026-06-08): "anechoic chamber price" - volume 110/mo, $1.22 CPC, KD N/A, intent Transactional, source business/02-semrush-product-category-analysis.md
사례 읽기
Anechoic & Acoustic Test Chambers
Anechoic Chamber For Sale Application Case for Fully Anechoic Chamber
SEMrush US (2026-06-08): "anechoic chamber for sale" - volume 40/mo, $1.54 CPC, KD N/A, intent Transactional, source business/02-semrush-product-category-analysis.md
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Send equipment drawings, site photos, target noise level, and documentation requirements for review.