As heat is taken away from a fluid, its particles. slow down and come closer together. ï®. This causes the fluid to contract â its volume. decreases. ï®. This causes the density to increase. (D=M/V if V gets smaller, M/V gets bigger) ï®. Viscosity will also be affected, as particles slow. down and come closer together, it gets harder. for them to move past each other. Therefore, viscosity increases.
The commercial kind are probably $250 on up. You can get a nice Shure brothers mike for around $120. Their SM-58 is good for recording and amplifying voices, and the SM-57 excels at recording or amping musical instruments. Sennheiser is a long-time company that also makes several lines of mikes (or mics, if you prefer) that range from home-use to phenomenal studio use.
Three types of microphones. There are three types of microphones that you can use with speech recognition software. The most common type of microphone is a USB headset. Nuance includes one of these with boxed versions of Dragon Dictate. While the headset they provide is acceptable, there are many headsets that are much better. The second type of microphone is wireless. There are two technologies for wireless: Bluetooth and DECT. Each offer different advantages and disadvantages. Finally, you can use a desktop microphone, which allows you to work without wires or without wearing the mic.