Loudspeaker placement and the room's dimensions will cause
certain frequencies within a room to resonate. Resonance is when
an object vibrates at a particular frequency. An object's size
and what it is made of determines the frequency. The puddle of
water, in the movie Jurassic Park, vibrating when the T-Rex
comes near , is a good example of a resonance taking place. When
we play music in our listening room, the air in the room will
resonate at certain frequencies. The resonate frequencies
determined by the room's dimensions and the materials of build.
These resonances are called modes. They can affect our systems'
sound by increasing or decreasing certain frequencies. I'm not
going to get into how to control theses modes in this article.
That will appear in a future HI-Fi Highlights article. Instead
I'm going to show you how to calculate these modes. This will be
useful for determining what actions to take to help the problem
or to help you with selecting/building a listening room. The
distance between the r