SONOMÈTRE SPL CONFORME OSHA
专业声音与音响诊断测试 - Display Test Online
Mesurez le bruit ambiant, le bruit de fond de votre pièce et les pics du microphone en dBA SPL en temps réel.
100% PRIVATE & BROWSER-BASEDZERO SERVER UPLOADS
All camera video feeds, microphone recordings, and photo booth captures execute strictly inside your device's browser memory (RAM). We do not collect, store, or transmit your media data to any cloud server.
专业工程级检测
专业诊断控制台
实时测量麦克风采集的声压电平 (dBFS / 估算 dBA) 与环境底噪。
实时声压级 (SPL):
0.0
dBA SPL
点击启动分贝检测
峰值保持锁定:
0.0 dB
历史峰值记录:
平均声压级:
0.0 dB
5秒平滑移动平均:
环境底噪基准:
-96.0 dBFS
极静环境 (~30dB)
安全阈值:
85 dBA
OSHA 安全暴露限值:
诊断协议与流程
如何进行屏幕测试 (01, 02, 03)
01
准备工作
清洁显示器表面灰尘，关闭环境光自动感应，并将屏幕设置为原生分辨率与最高刷新率。
02
开始执行
进入全屏模式 (F11)，利用诊断控制栏依次切换并观察各种专业测试图案。
03
结果评估
在暗室环境下从不同视角细致观察屏幕均匀度、坏点与拖影，参考工程指南判断面板品质。
PASS
Hardware Diagnostic Status
Live Hardware Telemetry
Plages de Niveaux Sonores
Interactive Tuning
Shortcuts
Keyboard Navigation
Space
Démarrer / ArrêterR
Réinitialiser CrêteTV users can navigate with D-Pad & Remote arrow keys
Technical FAQs & Helpful Content
常见问题解答 (FAQ)
关于此项诊断工具、校准步骤及显示器技术标准所需了解的一切。
01.How does this online decibel meter measure sound levels in dBA?
Our decibel meter uses the Web Audio API AnalyserNode to process real-time microphone RMS amplitude data. It scales incoming signal voltage into dBA Sound Pressure Level (SPL) estimates from 30 dBA (quiet room) to 120+ dBA (extreme noise).
02.Is my microphone audio recorded or sent to any server?
No. 100% private and browser-based. All microphone audio data is processed strictly inside your device's local RAM memory. Zero audio buffers are saved, recorded, or transmitted.
03.What is the difference between dBA, dBFS, and SPL decibel scales?
dBFS (Decibels Full Scale) measures digital audio signal levels relative to 0 dBFS clipping. dBA (A-weighted decibels) measures acoustic Sound Pressure Level (SPL) weighted to match human ear frequency sensitivity.
04.What are safe decibel noise exposure limits according to OSHA?
OSHA mandates that 85 dBA is the threshold for 8-hour continuous exposure without hearing protection. Continuous sounds above 90–100 dBA cause permanent hearing damage, while sound levels over 120 dBA cause immediate pain.
05.Can I use this decibel meter on smartphone mobile browsers?
Yes! Open this page in Safari on iPhone or Chrome on Android, tap 'Allow' when prompted for microphone access, and measure room noise instantly on mobile.
06.How accurate is a browser-based microphone decibel meter?
Internal device microphones provide highly accurate relative decibel readings and peak tracking. For certified ISO acoustic compliance, physical hardware calibrators are recommended.
07.What is Peak Hold and why is it useful?
Peak Hold tracks the absolute highest decibel spike recorded during your session. This helps identify sudden transient noise spikes like door slams or clap peaks.
08.How do I test my room's ambient noise floor before recording podcasts or streaming?
Leave your room silent for 5 seconds while running the meter. An ideal podcasting studio noise floor should stay under 35–40 dBA.
09.Why does my microphone decibel reading stay at zero?
Check your browser address bar permissions (click the lock icon) to verify Microphone permissions are set to 'Allow', and ensure no background app (Zoom, Teams) has locked the microphone.
10.What are typical ambient decibel levels for daily environments?
Silent bedroom (30 dBA), Quiet office (45 dBA), Normal conversation (60 dBA), Vacuum cleaner (75 dBA), Heavy traffic (85 dBA), Lawn mower (90 dBA), Rock concert (110 dBA).
不确定接下来该运行哪项测试？需要故障排除建议？
阅读完整诊断指南 →