中文版
全部普通教室已安装二氧化碳浓度监测仪 ― 为合唱比赛，让"通风"看得见
随着合唱比赛临近，各班级的练习也将逐步进入正式阶段。本校于今日，为了更好地预防传染病、也让大家能够更直观地掌握教室内的通风状况，在所有普通教室安装了二氧化碳浓度监测仪。
这种监测仪并不是用来检测传染病本身的设备。它通过测量教室内的二氧化碳浓度，作为确认"此刻通风是否充分"的一个参考指标。监测仪上会以较大的字体显示数值，通风状况也能通过颜色一目了然。
安装当天，学生们就表现出了浓厚的兴趣。有的学生特意对着监测仪呼气，结果发现仅凭一口气数值就会发生变化，不禁感叹仪器竟如此灵敏。透过数字，他们似乎实实在在地体会到，自己的呼吸正在一点一点改变着周围的空气。
合唱练习时，众多学生会同时放声歌唱。因此，我们在充分利用窗户、门和换气扇的同时，也会在歌唱的间隙勤加通风，并一边确认监测仪的数值，一边推进练习。
合唱比赛是全班同学齐心协力共同完成一件作品的重要活动。正因如此，我们希望在让学生尽情歌唱的同时，也同样重视让每一位同学都能以健康的状态迎接当天。
接下来，校园各处都将响起歌声。也希望各位家长在家中多加留意，做好晨间健康观察，并关注孩子身体状况的变化。
为了让学生能够安心、舒畅、尽情地投入合唱，本校今年也将继续完善相关环境。敬请期待北棱团队的歌声。
关键词：北棱中学校、学校日记、二氧化碳浓度监测仪、通风、合唱比赛、传染病预防
English version
CO₂ Monitors Installed in Every Classroom ― Making Ventilation Visible Ahead of the Choral Contest
With the choral contest approaching, rehearsals in each class are gradually moving into full swing. Today, to support infection prevention and to make it easier to see how well our classrooms are being ventilated, we installed CO₂ monitors in every general classroom.
A CO₂ monitor does not detect infection itself. By measuring the carbon dioxide concentration in a room, it gives us one useful indication of whether the air is being refreshed often enough. Each monitor displays the reading in large figures, and the ventilation status is also shown by colour, so it can be understood at a glance.
The monitors caught the pupils' attention straight away. Some deliberately breathed out close to the sensor — and were genuinely impressed to find that a single breath was enough to move the numbers. Seeing the figures shift seemed to bring home just how much their own breathing changes the air around them.
Choral rehearsals in particular involve a great many pupils singing at once. We will therefore make full use of windows, doors and extractor fans, air the rooms between pieces, and keep an eye on the monitor readings as rehearsals go on.
The choral contest is an important occasion at our school — one where a class builds something together. That is precisely why we want to value not only singing wholeheartedly, but also everyone arriving at the day in good health.
Before long, singing will be heard from every corner of the school. We would be grateful if families could keep up morning health checks at home and stay alert to any changes in their child's condition.
We will continue to prepare the environment so that our pupils can take part in the contest safely, comfortably and with everything they have. We hope you will look forward to hearing Team Hokuryō sing.
Keywords: Hokuryō Junior High School, School Diary, CO₂ monitors, ventilation, choral contest, infection prevention
