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Sound Sketch

How do computers represent sound?

Sound can be measured and quantified in many different ways. Sheet music is one way to represent a series of sounds. MP3 players and computers use a different representation to store a sound. This activity includes software that allows you to sketch and quantify sound using two different representations.

Instructions

1. Listen to the recorded song by clicking on the listen button. To stop any sound, press the listen button.

2. Using the pencil and different colors from the color menu to draw a picture that represents the sound over time.

Use the shift key on the keyboard to draw perfect horizontal lines.

Click on the erase button twice to erase the entire sketch.

3. There are two ways to play your sketch.

Listen to your sketch by pressing the Musical Staff button.

Then listen to your sketch by pressing the computer button.

Which method best reflects your intended picture?


 

Standalone version of the Sound Sketch Tool

National Council of Teachers of Mathematics Illuminating a New Vision for School Mathematics MarcoPolo Education Foundation
Illuminations is a partnership between the National Council of Teachers of Mathematics and the MarcoPolo Education Foundation
© 2000 National Council of Teachers of Mathematics
Use of this Web site constitutes acceptance of the Terms of Use
This page last updated: April 15, 2003


The mission of the National Council of Teachers of Mathematics is to provide the vision and leadership necessary to ensure a mathematics education of the highest quality for all students. The NCTM Illuminations Web site is devoted to providing Internet resources to improve the teaching and learning of mathematics in grades pre-K through 12. The views expressed or implied on this Web site, unless otherwise noted, should not be interpreted as official positions of the Council.