Sound Waves and frequency

  • Thread starter frozen7
  • Start date
  • #1
164
0
7. A block with a speaker bolted to it is connected to a spring having spring constant k = 20.0 N/m as in Figure 3. The total mass of the block and speaker is 5.00 kg, and the amplitude of this unit’s motion is 0.500 m. If the speaker emits sound waves of frequency 440 Hz, determine the range in frequencies heard by the person to the right of the speaker.
Ans: [ 439 Hz < f < 441 Hz ]


Can anyone help me to solve this? Give me some clues please.
 

Answers and Replies

  • #2
164
0
I do it in this way:

1/2 k x^2 = ma
a = 0.5
And I found the value of v1 (speed of speaker) = 0.707 by using v1^2 = u^2 =2as

Then I find the max frequency by f`=f ( v / ( v-v1))
min frequescy = f`=f ( v / ( v+v1))


Am I doing correctly?
 

Related Threads on Sound Waves and frequency

  • Last Post
Replies
4
Views
4K
  • Last Post
Replies
1
Views
943
  • Last Post
Replies
2
Views
900
  • Last Post
Replies
0
Views
5K
  • Last Post
Replies
8
Views
2K
Replies
0
Views
2K
  • Last Post
Replies
12
Views
395
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
9K
  • Last Post
Replies
2
Views
4K
Top