Datasheet

Scarlett 2i2 is the LED-lights that show the appropriate range of input for the micro-

phones, green is within good input range and red is not. In order to minimise noise pol-

lution while the lecturer is talking, the gain on the omni-directional mic had to be turned

off, and only turned on when a member of the audience wished to address the lecturer.

[38]

4.4.3 Shure MX391 microphone

There are a few different versions of the Shure MX391 microphone, two of which were

used for the ConnectPro solution; the cardioid and omni-directional microphones. Fig-

ure 20 displays one such microphone

Figure 20 Shure MX391 microphone [40]

The omni-directional microphone picks up sound within a 360° degree radius of the

microphone while the cardioid picks up sound in a heart shape pattern primarily sounds

being picked up from the front, while being less sensitive at the sides and picking up no

sound from behind: Figure 21 will demonstrate the pick-up patterns for both micro-

phones. [39]