Compression
This question is misguided. It is not the sound waves which are apart, but the particles of the medium. A place where the particles are further apart is called a rarefaction. Where they are crowded together is called a compression.
which kind of sound is produced by sound waves with peaks that are very close together?
Sound waves are known as longitudinal waves.
music
When you clap your hands together, the collision creates vibrations in the air that travel as sound waves to your ears. These sound waves are then processed by your brain to perceive the sound of clapping.
When sound waves interfere and result in quieter sound, it is known as destructive interference. This occurs when waves are out of phase and cancel each other out, reducing the overall amplitude of the sound.
The bunched up parts in longitudinal waves are called compressions. These are regions where the particles of the medium are crowded together.
Pitch is another name for the frequency of sound waves . . . that is, how close the waves are together. Pitch is a term usually used in terms of music.
Longitudinal waves push particles together by compressing them and spread them apart by rarefying. Sound waves are an example of longitudinal waves.
The point where sound waves come together (foci).
The sound waves compress, causing the air molecules to be closer together as they propagate towards the hearer. This results in an increase in air pressure, which is perceived as a louder sound.
Sound waves travel fastest through solids because the particles are closest together, allowing the waves to propagate more efficiently.