Low-pass filter - how to achieve an excellent sound?
Very many people are interested in a low-pass filterfrequencies, which is necessary for the subwoofer. Usually the human ear is able to perceive sound, starting from 20 and ending with 20 thousand Hertz. And notes, the sound of which occurs at the lower limit, is a bass. Accordingly, at the upper limit, the sound is more like a squeak. For those who want to learn how sound sounds at different frequencies, a specially created program that does not require a separate installation is specially created. You only need to download and enable it. The interface of the program, too, will not cause any special difficulties.
When studying what a bottom filter isfrequencies, do not forget about the cutoff frequency, the increase of which is not necessary. When making a subwoofer, it is done so that the lower frequencies sound unchanged, while the upper frequencies are transmitted with significant distortion. To do this, use a special filter, which removes all too high sound.
The subwoofer should meet the following parameters: the smaller the speaker that plays with it, the bass speaker, the higher the cutoff frequency of the filters used in the sub. In other words, if the speaker has a 10 cm bass speaker, then the cutoff frequency should reach three hundred Hertz. If the size of the bass column is equal to thirty centimeters, the filter cutoff frequency reaches a hundred Hertz.
But if the subwoofer has a small speaker,then, most likely, it will not be able to reproduce very low frequencies. If the situation is reversed, then the sub will be able to recreate the low frequencies. That is, a good subwoofer can be determined by how well it can resume low frequencies. Higher subwoofer frequencies usually reproduce with very strong distortion.
In general, the cutoff frequency does not cause anycomplexities. It remains to disassemble the low-pass filter itself. It can be passive or active. In the first case, the filter is a huge inductor with several capacitors. In this case, there is no need to install separate amplifiers. Also, no need to install additional power supply. Passive filter must be connected directly to the dynamics of the subwoofer.
Due to the fact that the low-pass filter useslow cut-off frequency, and its order is high, the need for a passive design is eliminated. In this case, you must use an active filter. Its disadvantage is the mandatory requirement in a separate power supply and amplifier on the subwoofer channel. In addition, in some cases, you may need an adder.
On this basic parameters, which has a low-pass filter, end.
