Stereo sound makes it possible for different sounds to come out of different speakers.
use different techniques and play it differently
That makes no sense at all.
A sub-woofer.
It sounds like another person hitting a different person.
No. Sometimes that makes it worse.
all different sounds
The brand of computer speakers does not have to be the same brand as the computer. It really makes no difference.
Every brand of speakers is different and many people have specific preferences based off of what they are used to or what they enjoy. BOSE and JBL are both great brands of speakers.
Higher frequency, higher pitch.
something
your ears pick up vibrations called sound waves in the air and we inperpret these as 'sounds'
Sony makes numerous high quality models that have detachable wireless speakers.
Bose, Incorporated makes Bose speakers. They are a privately-owned company. In addition to making speakers, they also make headphones and home entertainment systems.
use different techniques and play it differently
The size, shape type of engine all affect the noise an engine makes
The Sonus Faber company typically makes stylish car stereo speakers. It also makes your usual home speakers and subwoofers. The designs are more stylish looking than traditional speakers.
The best way to figure out if you have a pipe leak is by the sound it makes. Different kinds of sounds means different kinds of leaks. This article summarizes the different kinds of sounds you might hear: http://www.subsurfaceleak.com/find_leaks.html