Question

grade 7_sound waves properties
part 2. describe the oscilloscope. choose the correct answer.
b has greater amplitude
a has greater amplitude
b is louder than a
a is louder than b
a and b have the same frequency
a has more frequency
b has more frequency
b has higher pitch
a has higher pitch
a has more frequency
b has more frequency

Explanation:

• Amplitude and Loudness: Amplitude is the maximum displacement from the rest position. A larger amplitude means a louder sound. In the first set of graphs (A and B), A has a smaller amplitude (vertical height) than B. So, B is louder than A.
• Frequency and Pitch: Frequency is the number of complete waves in a given time. A higher - frequency wave has a higher pitch. In the second set of graphs (A and B), A has more complete waves (higher frequency) in the same horizontal space, so A has a higher pitch.

Answer:

• B is louder than A.
• A has higher pitch.
• A has more frequency.