What are the domestic and international EMC (electromagnetic compatibility) standards for audiometers?

As an acoustic device used for hearing assessment, an audiometer must comply with EMC standards GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international). The standards focus on ensuring that the accuracy and frequency stability of the output sound pressure level (SPL) remain unaffected under radio frequency electromagnetic fields, while also preventing the device from generating excessive electromagnetic emissions that could interfere with other devices. An audiometer internally contains an audio codec, piezoelectric or electromagnetic headphone drivers, and a power amplifier for the bone conduction transducer. These analog audio circuits are susceptible to power supply noise and spatial radiation interference, which can cause background noise in the test tones, affecting diagnostic accuracy.