3B55.47 - Interference of Speakers

Interference of speakers

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PIRA Classification: 3B55.47

Description: Two speakers are connected to the same frequency driver; however, a phase reversing switch is placed between one speaker and the driver. When the speakers are placed together and are in phase, a loud tone is heard. When the phase of one speaker is reversed, the tone almost disappears. When one speaker is then moved away, the tone returns.

Special Instructions: The generator should be set to 900 Hz.

Condition: Ok

Setup time: 2 minutes

Safety Issues: None