As well as the minimum power consumption requirements of all your programs. If you have an early Pentium processor, explore the addition of the MMX chip to increase the CPU output of your present processor. Bigger And Better Noise Problems. Noise suppression microphones are the last line of defense against external noise and are only part of the answer to noise problems. The first line of defense against noise is your computer work space.
All monitors generate electronic noise.
Large screen monitors use more power and generate more electronic noise. Powerful processor and power sources generate electronic noise. The next line of defense is to place Sound Cards away from both the processor and power source. Sometimes, inside small computer cases, the Sound Card needs to be shielded. The last line of defense is the microphone.