Web App “Oscilloscope” for Everyone! (Find Teaching Materials with Scratch!)

No Oscilloscope? No Problem! Class Ideas for Visualizing Sound with Scratch and Free Tools

Have you ever wanted to show students the volume or waveform of sound in a science class but found that professional oscilloscopes are just too expensive and complicated to use? Teaching students how to operate them can be a hassle, making it a high barrier to entry for classroom use.

That’s where a digital, oscilloscope-like teaching tool comes in handy! With just a PC or tablet and an internet connection, you can visualize changes in sound in real-time without any special equipment.

Using Scratch to Visualize Sound in Real-Time!

Scratch is a popular programming tool used in elementary and middle schools. You can create a simple program using a microphone input to display sound volume as a real-time graph.

Here’s a great example: oscillo_1  https://scratch.mit.edu/projects/18315338

How to Use:

  1. Turn on the microphone (you may need to allow permission in your browser settings).
  2. Click the green flag.
  3. Make a sound, and… a bar graph will appear and move!

Students will be amazed as they see the concept of sound volume visualized right before their eyes. This simple project is a perfect way to introduce or review the concept that “sound is a wave” without needing any expensive equipment.

Free Web Oscilloscope: “XXY OSCILLOSCOPE”

For those who want to view waveforms more professionally, we recommend this web app. You can use it on any device—PC, tablet, or smartphone—as long as you have a web browser. No app installation is required.

XXY OSCILLOSCOPE https://dood.al/oscilloscope/

Webアプリオシロスコープ「XXY OSCILLOSCOPE」が音の授業で便利!

This tool captures audio and displays the waveform in real-time. Detailed instructions on how to set it up are available on the website.

Other Useful Tools

  • SoundBeam (App) This is a paid app, but it is very useful for teachers to have for experiments and verification.

The web app “XXY OSCILLOSCOPE” introduced in this blog post is a fantastic tool that makes visualizing sound in an educational setting easy, solving the problem of expensive and complicated physical oscilloscopes.

Freqounter (App) This app analyzes the frequencies contained in a sound. It’s great for checking tuning forks or musical instruments.

音に含まれる周波数を調べるアプリ「freqcounter」なぜギターと音叉は違う音色?音の振動数(周波数)を深掘り!

AFG (Free Software) This is a signal generator app that can produce sounds at a frequency you choose. It’s useful for understanding the concept of pitch.

理科実験の頼れる相棒!簡単操作で周波数を自由自在に設定できる無料アプリ『Audio Function Generator』(AfG)

For Teachers Who Want to Use Scratch in Science Class

 


Beyond what we’ve covered, Scratch has many other teaching materials for science, including simulations and tools for observation logs. I also have my students create their own teaching materials with Scratch, which promotes inquiry-based learning. You can easily apply these projects to various topics like sound, light, and motion, so I encourage you to explore what’s available.

You don’t need expensive equipment to incorporate visualization into your science lessons. By using Scratch and other web apps, you can create “aha!” moments for your students.

If you know of any other useful tools, please let me know! I’d love to share them in an article.

3月のイチオシ実験!電気スライム

  • みんなが大好きスライム作り。手作りだけ楽しんで終わりじゃもったいない・せっかくなので電気を流してみよう!電気回路の学習にもなります!

テレビ番組・科学監修等のお知らせ

書籍のお知らせ

講師・ショー・その他お知らせ

Explore

  • 楽しい実験…お子さんと一緒に夢中になれるイチオシの科学実験を多数紹介しています。また、高校物理の理解を深めるための動画教材も用意しました。
  • 理科の教材… 理科教師をバックアップ!授業の質を高め、準備を効率化するための選りすぐりの教材を紹介しています。
  • Youtube…科学実験等の動画を配信しています。
  • 科学ラジオ …科学トピックをほぼ毎日配信中!AI技術を駆使して作成した「耳で楽しむ科学」をお届けします。
  • 講演 …全国各地で実験講習会・サイエンスショー等を行っています。
  • About …「科学のネタ帳」のコンセプトや、運営者である桑子研のプロフィール・想いをまとめています。
  • お問い合わせ …実験教室のご依頼、執筆・講演の相談、科学監修等はこちらのフォームからお寄せください。