TOEFL iBT Speaking. In this integrated speaking task, you will read a short pass

Now listen to part of a lecture on this topic in a music class.
When you’re "micing," you have to consider both the performers and the room. You want to maximize the sound from the performers but reject the unwanted sounds from other sources. This is why polar pattern is so important.
The most popular pattern hears only, or mostly, the sounds coming from one direction. This is the unidirectional microphone, which picks up the signals that arrive in front. Unidirectional microphones are good for recording bands in a studio. You just aim the mic at the instruments you want to pick up. Unidirectional mics are good for performers in concert halls and nightclubs, and also for recording speech. Their chief advantage is that they keep out audience noise, echoes, and other background noise.
In contrast, omnidirectional microphones can hear sound from all directions because their polar pattern is almost a perfect sphere. Omnidirectional microphones will create a feeling of space. Because they hear from all directions, they pick up sounds from the musicians as well as sounds reflected from the walls and ceiling, and this gives the effect of listening in a large room. An omnidirectional mic is great for the pipe organ, or for the bass drum in an orchestra or symphonic band.
The professor describes unidirectional and omnidirectional microphones. Explain how their polar pattern makes these microphones appropriate for recording specific performances.