Featured in PASCO’s Physics through Inquiry Teacher Guide

Physics through Inquiry Teacher Guide

(PS-2873C)

Features over 30 inquiry based labs covering the core topic areas of mechanics, electricity and magnetism, optics, thermodynamics and more.

Sound Intensity

Lab Summary

Use a sound level sensor to investigate the sound intensity from devices such as tuning forks, musical instruments, and the human voice.

Theory

In this experiment, students investigate the sound intensity from devices such as tuning forks, musical instruments, and the human voice. Students:

  • Compare the sound level produced by different sources.
  • Explore the intensity of sound as a function of distance from the sound source.
  • Develop an understanding of the decibel scale versus the intensity of sound waves.

Method

Students will gain experience conducting the following procedures:

  • Observing the intensity of sound emitted from different sound sources.
  • Measuring the intensity of a sound as a function of the distance from the source, and investigating the relationship.
  • Comparing the decibel scale to raw intensity.

Sensors / Equipment Used:

PASPORT Sound Level Sensor

(PS-2109)

Measures true sound level in decibels (both dBA and dBC scales) and sound intensity. For use with PASPORT Interfaces.

PASPORT Sensor Extension Cable

(PS-2500)

Allows an additional two meter length extension on all PASPORT sensors.

Materials Used:

Power amplifier/function generator

Meter stick

Speaker

Tuning fork

Musical instrument

The Associated Bundle:

Physics Standard Sensor Bundle

(PS-2931B)

Contains the probeware needed to perform all 37 lab activities in the Physics through Inquiry lab manual.

Interface Required

This experiment may require software and an interface for data collection.