If the peaks and troughs are exactly opposite, the sound can even be canceled out. However if the two sound waves have opposing peaks and troughs, the sound will become distorted. If the peaks and troughs are in exact alignment, the sound can be enhanced. This becomes a problem if the two different sound waves meet, a phenomenon known as interference. That means that their peaks and troughs are in exact opposite alignment. Where this waveform is at any time is referred to as its “phase.” A driver pushing air from both its front and back will create sound waves that are 180 degrees out of phase with each other. The air changes from high to low pressure at a speed determined by the pitch of the sound.
The best way to look at the problem is to remember that sound waves have peaks, consisting of high air pressure, and troughs, consisting of low air pressure.
If we look at the first reason for using speaker enclosures – to prevent the front and rear-firing waves from canceling each other – we first need to make sure we understand what is meant by this. Enhance the sound produced by bass drivers.Prevent front-firing sound waves from interfering with rear-firing waves.Loudspeaker enclosures influence a loudspeaker’s sound in the following ways: The cross-section of a Teufel Audio tower speaker How speaker enclosures influence sound It also enhances and guides the sound from the drivers and even affects the loudspeaker’s overall efficiency.
Still it would be wrong to think that that’s all a loudspeaker enclosure does. Of course, all of these components need to be somehow brought together and contained which is where the enclosure comes in. Loudspeakers are comprised of many distinct parts: At least one driver, a crossover, and – with active loudspeakers – an integrated amplifier. Loudspeaker enclosures: More than attractive cabinets
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