4.3 Selecting types of microphones

Problem

Read this section if you are unsure what type of microphone to use.

Solution

We have used non-directional electric condenser microphones, which cost only several thousand yen each. It is not always necessary to use more expensive microphones. Microphones with a higher signal-to-noise ratio are preferable. It is better to choose wires with proper covering.

Discussion

To record sounds with a sufficiently high signal-to-noise ratio, choose wires with proper covering and with plugs. Although this type of microphone is usually expensive, we have confirmed that this system works with microphones costing several thousand yen each. When wiring inside a robot, make sure that all wires are covered and that interference by other signal wires is suppressed, rather than using expensive microphones.