Sound Interference and Signal Generation

The video demonstrates interference patterns using two speakers emitting the same sound frequency. It explains how constructive and destructive interference occurs based on the listener's position relative to the speakers. A microphone and meter are used to visualize and hear the changes in sound levels as the listener moves through the interference pattern. The demonstration highlights the alternating loud and soft sounds due to interference, concluding with observations of sound changes.

What is the purpose of the signal generator in the demonstration?

• To amplify the sound from the speakers

• To generate a tone of about 2000 Hertz

• To record the sound produced by the speakers

• To measure the distance between the speakers

What is the frequency of the tone generated by the signal generator?

• 1000 Hertz

• 1500 Hertz

• 2000 Hertz

• 2500 Hertz

What happens when the distances from the listener to both speakers are the same?

• The sound waves become inaudible

• The sound waves overlap constructively

• The sound waves create an echo

• The sound waves cancel each other out

What is the result of destructive interference?

• The sound becomes louder

• The sound cancels out

• The sound frequency increases

• The sound becomes distorted

What is the effect of moving slightly so that the path difference is half a wavelength?

• The sound becomes a single tone

• Constructive interference occurs

• The sound frequency doubles

• Destructive interference occurs

What tool is used to demonstrate the interference pattern visually?

• A soundproof chamber

• A microphone attached to a meter

• A frequency modulator

• A sound amplifier

What is the role of the microphone in the demonstration?

• To pick up sound from the speakers

• To cancel out noise

• To generate sound waves

• To amplify the sound

What does the readout on the meter indicate as the microphone moves?

• The frequency of the sound

• The loudness of the sound

• The duration of the sound

• The distance between the speakers

What pattern is observed on the meter as the microphone moves?

• A loud-soft pattern

• A constant low level

• A random pattern

• A constant high level

How many minima and maxima were observed during the demonstration?

• One or two

• Three or four

• Seven or eight

• Five or six