GB/T 45657-2025 in English
VALIDRequirements for audio-visual technology in informationized teaching environment
- Issued on:2025-05-30
- Implemented on:2025-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
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《GB/T 45657-2025信息化教学环境视听技术要求》由TC28（全国信息技术标准化技术委员会）归口，TC28SC36（全国信息技术标准化技术委员会教育技术分会）执行，主管部门为国家标准委。
Introduction
Standard Background and Evolution
As an upgraded version of GB/T 36447-2018, this standard integrates the technical specifications of new teaching equipment such as LED display system and recording and broadcasting cabin for the first time, reflecting the transformation trend of educational informatization from "multimedia classroom" to "intelligent learning space".
Core content analysis
1. Teaching environment classification system
| Classification dimension | Type | Typical parameters |
|---|---|---|
| Physical space | Small classroom | ≤70㎡ |
| Large classroom | 200-400㎡ | |
| Recording cabin | Independent and detachable |
2. Key technologies for visual health
2.1 Core indicators of lighting
- Writing board illumination: ≥500lx (uniformity ≥0.8)
- Color temperature range: 3300K-5300K
- Blue light protection: RG0/RG1 level
2.2 Display system requirements
| Device type | Brightness requirement | Color gamut coverage |
|---|---|---|
| Large screen flat panel | 300cd/m² | REC709≥100% |
| Projection system | 2000lm | NTSC≥70% |
3. Key points of acoustic design
3.1 Noise control classification
- First-level standard: Sound pressure level difference of partition wall ≥55dB
- Recording and broadcasting cabin: Reverberation time ≤0.4s(125Hz)
3.2 Sound reinforcement system indicators
| Classroom type | STI index | Sound field unevenness |
|---|---|---|
| Demonstration type | ≥0.6 | ≤10dB |
| Recording type | ≥0.65 | ≤6dB |
Implementation suggestions
- Space adaptation: Small classrooms should give priority to 86-inch interactive flat panel, and large classrooms are recommended to use laser projection + sound reinforcement array
- Health protection: The lighting system needs to be regularly tested for stroboscopic depth (≤0.032%) and VICO value (＜2)
- Acoustic optimization: Art classrooms are recommended to adopt variable reverberation design, and the adjustable reverberation time range is 0.34-0.46s
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