イヤホン安全リスニング時間計算機 音量と時間を手入力し、今日の騒音量を累計
Step 1：聴取セッションを追加
これは手動記録と当日累計のツールです。バックグラウンド常駐やマイクの継続監視は行わず、タブを閉じると停止します。
Enter a value from a headphone app, health data, or sound-level estimate. If you do not have a measurement, estimate conservatively.
Enter how long this session actually lasted. Multiple sessions today are added together.
Step 2: Today's accumulated dose
Below the daily 100% dose so far; ear breaks are still a good idea.
Current estimated level: 85 dB(A)
記録はこのブラウザの localStorage のみに保存され、アップロードされません。
Step 3: Today's dose chart
The doughnut chart shows used dose and remaining 100% allowance; red means the daily dose is exceeded.
Step 4: Today's details
Formula and honest disclaimer
- Model: 85 dB(A) for 8 hours = 100% daily dose; every +3 dB halves the safe time.
- This is not medical or hearing diagnosis. dB conversion is estimated, and real exposure depends on device, headphones, ambient noise and fit.
- Following WHO Make Listening Safe concepts, lowering volume, shortening time and taking breaks matter more than chasing exact numbers.
イヤホン安全リスニング時間計算機とは？
今日入力した各イヤホン聴取を noise dose（騒音量）の目安に変換する手動トラッカーです。 WHO Make Listening Safe は、安全な聴取を音量だけでなく暴露時間も含めて考えることを促します。
The calculation uses 85 dB(A) for 8 hours as 100% daily dose and follows the NIOSH 3 dB exchange rate: every 3 dB increase halves the allowed time. For background on decibel dB.
How to use it well
- After music, podcasts, games or meetings, add the estimated level and minutes manually.
- If you do not know the dB value, use the volume-percent estimate or descriptive level, but treat it as a safety reminder.
- When today's dose approaches 80%, reduce volume or take a break; do not treat 100% as a target.
Why it does not claim automatic monitoring
フロントエンドのWebページはタブを閉じた後に動作し続けられず、イヤホン出力やマイク暴露を継続監視すると主張するのは誠実ではありません。本ツールは入力されたデータだけを計算します。
For another honest manual daily tracker, see the カフェイン蓄積計算機.
If you have tinnitus, hearing loss or ear pain, seek qualified medical care.