Solving Sound-Related Questions: Find the Answers!

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In summary, the person is asking for help with two sound-related questions. One involves determining the distance to the nearest underwater reflecting surface based on the speed of sound and the time it takes for the sound to return. The other involves using the frequency and speed of sound to calculate the distance between nodes for constructive interference. The person is grateful for the explanation of the "node" concept.
  • #1
Markd
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Hi,

I am having problems with 2 sound related questions


1) While diving you make a loud clank with your oxygen tanks on a rock, how far away are you from the nearest underwater reflecting surface if the sound returns to you in 3.00s (assume the speed of sound in water to be 1440m/s)

2) A tuning fork with a frequency of 324Hz is held over a tube whose length can be changed by raising and lowering a column of water in the tube. The surface of the water, initially very near to the top of the tube is gradually lowered if the speed of sound in air is 336m/s how far from the top of the tube is the surface of the water when the first point of constructive interference is detected

I really did try to figure them out but must be missing something any hints?
 
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  • #2
1) While diving you make a loud clank with your oxygen tanks on a rock, how far away are you from the nearest underwater reflecting surface if the sound returns to you in 3.00s (assume the speed of sound in water to be 1440m/s)

Well that's pretty easy isn't it? the sound has to travel to the "reflecting surface" and then back again in 3 seconds. How far can sound travel in 3 seconds? What is half of that?

2) A tuning fork with a frequency of 324Hz is held over a tube whose length can be changed by raising and lowering a column of water in the tube. The surface of the water, initially very near to the top of the tube is gradually lowered if the speed of sound in air is 336m/s how far from the top of the tube is the surface of the water when the first point of constructive interference is detected
If the frequency is 324 waves per second and the speed is 336 m/s, how long is one wave? Since a "node" occurs at the midpoint of a wave, how long can the distance from one node to another be?
 
  • #3
Great thanks!

It was the "node" part of the question that confused me =/
 

1. How can I improve the sound quality in my recordings?

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Dynamic microphones are generally more durable and can handle higher sound pressure levels, making them a good choice for recording loud sources like drums or guitar amps. Condenser microphones, on the other hand, are more sensitive and can capture more detail in quieter sources like vocals or acoustic instruments. They also require power from an external source, such as a battery or phantom power from an audio interface.

3. How do I eliminate feedback in live performances?

Feedback occurs when the sound from a loudspeaker is picked up by a microphone and amplified again, creating a loop of sound. To eliminate feedback, make sure your speakers are not pointed directly at microphones and that you have proper microphone placement. Additionally, using an equalizer to cut out frequencies that are prone to feedback can also help.

4. What is the best way to mix and balance different instruments in a recording?

The best way to mix and balance different instruments in a recording is to use EQ and panning to create space for each instrument in the mix. This means cutting out unnecessary frequencies for each instrument and placing them in different areas of the stereo field. It's also important to use compression to balance the dynamics of each instrument and make them sit well together in the mix.

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