Just because your phlegm is white or yellow does not give you a clean bill of health. Phlegm color is a reference point that needs to be considered along with other symptoms. If you have any reason to think your condition is worsening or your symptoms are bad, talk to your doctor. Geisinger otolaryngologist Dr. Barbara Kreel, MD, sees patients at Geisinger Wyoming Valley Medical Center in Wilkes-Barre.
A really nice sounding podium microphone is the AKG 747, C747 (discontinued) - Shotgun Microphone | AKG Acoustics. They are no longer made but are sometimes available on Ebay. They have a very natural sound to them and they are not harsh sounding in the least. Best of luck.
The condenser microphone is built with an amplifier attached to it. The amplifier is required to operate this type of microphone. A very low-noise, high-impedance amplifier is used and it provides a low output impedance. Without the amplifier, the microphone's output signal would be so low, it wouldn't be useful. condenser microphone needs to receive an external voltage to both charge the diaphragm of the microphone so that the microphone can have charged plates (positive and negative plates) and to provide power to the amplifier.