Beat Frequency Practice

When 2 sound sources are vibrating simultaneously, we sometimes hear beats because

• the 2 sound waves are very different

• the 2 sound waves are very similar

• the 2 sound waves are identical

• the 2 sound waves are very loud

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

Select all that apply.

• Beat frequency measures how many beats you can hear per second.

• Beat frequency measure how long it takes before a beat is heard.

• Beat frequency is measured in decibels (dB).

• Beat frequency is measured in hertz (Hz).

Tags

NGSS.HS-PS4-1

Select all that apply. 2 sounds have a beat frequency of 4 Hz. If one of the sounds has a frequency of 357 Hz, what could the frequency of the other sound be?

• 353 Hz

• 359 Hz

• 361 Hz

• 363 Hz

Tags

NGSS.HS-PS4-1

While tuning one of your piano keys and comparing it to a tuning fork, you hear 8 beats in 4 seconds. What is the beat frequency produced by both sounds?

• 2 Hz

• 4 Hz

• 8 Hz

• 32 Hz

Tags

NGSS.HS-PS4-1

To tune your guitar string, you listen to what it's supposed to sound like from an online tuner. When playing both sounds at the same time, you notice that you can hear 6 beats over 2 seconds. You also notice that your guitar string sounds lower than the online sound. What is the frequency of your guitar string if the online frequency is 82 Hz?

• 79 Hz

• 80 Hz

• 82 Hz

• 85 Hz

Tags

NGSS.HS-PS4-1