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When validating quietness for home appliances, fans, precision motors, medical devices, transformers, and consumer electronics, we are not only asking whether a product is "loud" or "quiet." We need to know where the sound comes from, under which operating condition it appears, and in which frequency range it becomes uncomfortable. A quiet product can sometimes [...]
Wearable audio devices are becoming smaller, smarter, and more complex. From TWS / OWS earbuds, bone-conduction earphones, hearing aids, smart glasses, and smart watches or smart bands, modern wearable devices can no longer be judged only by whether their acoustic output follows a frequency response curve. In real production environments, a device may pass frequency [...]
