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Model：S80 Noise insulation：outdoor ambient noise ≤55dB (A), indoor background noise ≤28dB (A) Environmental protection：Formaldehyde release ≤0.4mg/L,meeting《Indoor decorating and refurbishing materials—Limit of formaldehyde emission of wood-based panels and finishing products》 Reference standard：JJF 1191-2019 《Calibration Specification for Acoustic Performance of Audiometry Rooms》 GB 3096-2022 《Environmental quality standards for noise》 GB 50325-2020 《Standard for indoor environmental pollution control of civil building engineering》 Applications：hearing testing, on-board hearing screening
