Measuring adapter noise according to ISO 3745-2012 helps assess product quality, detect design flaws, optimize performance, and ensure compliance with EMC standards. Discover the measurement process at DASM Institute now!
Have you tested your adapter’s noise level?
Don’t let a small issue like noise interference impact user experience and market competitiveness!
DASM Certified for Acoustic Testing Activities
Soundproofing Test of Remak® XPS Foam in an Impedance Tube at DASM
Electronic devices such as chargers and switching power supplies can generate noise due to switching oscillations, circuit vibrations, or transformer magnetostriction. While the sound level may not be high, in quiet environments such as libraries, offices, or bedrooms, these noises can be disturbing and affect device performance.
DASM Institute applies precise measurement methods according to ISO 3745-2012, helping businesses control noise power levels, optimize designs, and ensure products meet international standards.
Why Measure Acoustic Emission From The Adapter?
✔ Assess product quality – Ensure smooth operation without disturbing users.
✔ Detect design flaws – Identify issues related to switching, magnetostriction, mechanical resonance, and electromagnetic interference (EMI).
✔ Comply with noise standards – Meet ISO 3745-2012, IEC 62368-1, CISPR 32 for product reliability and quality.
✔ Optimize design & reduce customer complaints – Minimize noise, extend product lifespan, and reduce technical faults.
Causes of Noise of the Adapter
Power supply noise can originate from several physical factors:
🔹 Magnetostriction Noise – Transformer expands and contracts under AC current, causing vibrations.
🔹 Switching Frequency Noise – High-frequency oscillations in SMPS (Switching Mode Power Supply) within the kHz range, affecting efficiency.
🔹 Mechanical Resonance Noise – Components like MLCC capacitors, inductors, and transformers vibrate, producing ultrasonic noise.
🔹 Arcing Noise – Poor-quality contacts or faulty soldering create electromagnetic interference, generating unstable noise.
Electrical Noise Measurement at DASM Institute
Applicable Standard – ISO 3745-2012
ISO 3745-2012 defines sound power and energy levels through sound pressure measurements in an anechoic or semi-anechoic chamber.
Adapter Noise Measurement Environment
✅ Specialized anechoic room with low background noise (~17 dB) to eliminate environmental interference.
✅ ISO-compliant test space for maximum accuracy.
Measurement Equipment
📌 Class 1 Measurement Microphone (NOR140) – IEC 61672-1 standard, accurately measures SPL (Sound Pressure Level) & noise frequency.
📌 FFT Analyzer (Fast Fourier Transform) – Analyzes frequency range to identify noise sources.
Measurement Process
🔹 Step 1: Place the adapter under standard operating conditions.
🔹 Step 2: Record SPL at multiple positions around the device.
🔹 Step 3: Analyze noise frequency spectrum using FFT.
🔹 Step 4: Compare results with ISO 3745-2012, IEC 62368-1, CISPR 32.
🔹 Step 5: Provide technical solutions for optimal noise reduction.
Results & Benefits of Adapter Noise Measurement
✔ Determine noise levels to assess if design improvements are needed.
✔ Ensure adapters meet ISO 3745-2012 standards.
✔ Detect noise issues, optimize circuits & components for higher efficiency.
✔ Offer noise reduction solutions, enhancing product quality & market competitiveness.
Why Choose DASM Institute?
ISO-standard equipment ensuring accurate measurements.
Experts with years of experience in acoustics, noise measurement & EMC.
Professional testing process with detailed reports.
Support for design optimization to reduce noise & improve product quality.
For Adapter & Electronic Device Noise Testing according to ISO 3745-2012 in Vietnam, please contact the DASM Institute for Acoustic Materials Development & Application via hotline for detailed consultation.
