QAV Technologies provides state-of-the-art acoustic measurement, analysis, and debugging facilities. By combining an Anechoic Chamber and a Reverberation Chamber, we provide complete acoustic characterization ranging from pure sound source directional behavior to real-world diffuse noise performance.
1. Anechoic Chamber (Free-Field)
Designed in accordance with ISO 3745 free-field principles.
"To measure, record and analyze the pure acoustic behavior of any sound source."
Core Measurements
- Sound Pressure Level (SPL)
- Engineering Sound Power
- Frequency Response (narrowband & 1/3-octave)
- Directional Radiation / Polar Response
Noise & Vibration Analysis
- Tonal noise identification
- Resonance & structural noise analysis
- Harmonic & order-related noise
- Vibration-induced acoustic issues
Sound Quality Evaluation
- Tonal balance & spectral characteristics
- Identification of annoying tones
- Comparison of design variants
- Audio & perceptual issue correlation
Debugging & Root Cause
- Noise source localization
- Separation of airborne vs. structure-borne noise
- Enclosure & assembly noise impact
- Design vs. manufacturing noise differentiation
Typical Customer Questions Answered:
- "Where is the noise really coming from?"
- "Why does it sound bad even though SPL is acceptable?"
- "Which frequency or component should we fix?"
2. Reverberation Chamber (Diffuse-Field)
Room calibrated to MIL-STD-912.
"To measure, record and analyze product acoustic performance under standardized and real-world diffuse noise environments."
Core Measurements
- Active Noise Cancellation (ANC) Measurement (Headphone / Wearable Audio)
- Passive Noise Cancellation Measurement (Headphone / Wearable Audio)
- Average SPL in diffuse field
- Frequency-dependent attenuation performance
- Product benchmarking & comparison
Noise Exposure & Stress Testing
- Noise exposure testing
- Acoustic stress testing under elevated noise levels
- Performance stability under sustained noise
- Reliability screening under acoustic load
Real-World Performance Evaluation
- Product behavior in diffuse noise environments
- Performance consistency across orientations
- Comparison between product variants or competitors
Debugging & Root Cause
- ANC performance stability and frequency effectiveness
- Passive noise attenuation weaknesses
- Noise sensitivity and immunity issues
- Performance drift under noise exposure
Typical Customer Questions Answered:
- "How good is our ANC / passive isolation?"
- "Will this product survive or degrade under noise stress?"
- "How do we compare against competitors?"
1. Measurement
Identify & Test Issues with precision instrumentation.
2. Analysis
Examine & Diagnose acoustic phenomena and spectral data.
3. Debugging
Fix & Resolve root cause acoustic and resonance problems.
4. Improvement
Suggest Solutions, optimization & design enhancements.
Audio Product Applications
- Transducers & Drivers: Raw speakers, micro-speakers, acoustic drivers
- Wired & Portable Speakers: Bluetooth speakers, outdoor rugged speakers
- Home Audio: Soundbars, subwoofers, compact home audio systems
- Communication: Conference speakers, speakerphones, microphones
- Personal Audio: Headphones, earphones, TWS (True Wireless Stereo) earbuds
Cross-Industry Non-Audio Applications
- Home Appliances: Coffee machines, vacuum cleaners, hair dryers, air purifiers
- Tools & Motors: Power tools, blowers, electric motors, small pumps, cooling fans
- IT & Enterprise: Servers, power supplies, printers, office equipment
- Medical Devices: Automated External Defibrillators (AED), hearing aids, diagnostic devices with voice prompts
- Industrial & Automotive: HVAC, fan & motor noise, acoustic insulation panels
* Applicable products within chamber free-field and diffuse-field limits.
Inquiries & Test Bookings
If you would like to learn more, request a quote, or arrange specific acoustic testing for your products, please contact our engineering team:
John See: johnsee@qavtech.com
H.S. Tham: hstham@qavtech.com