What is an RTA mic? What is it used for? What does it Measure?

Question

How do you use it? For example, the dbx driverack pa uses an RTA mic?

Answer 1

It looks like RTA stands for Real Time Analyzer. What happens is this: when you play sound in your room or car, the room may deaden certain ranges of frequencies (like if you have a big sofa or something, it may absorb high frequency sound), so when you play something back, it won't sound the same as the studio where it was recorded. If you notice a big difference between the way your audio system sounds when you use headphones instead of the speakers, this is why. To correct this, you need to analyze your room's acoustics and set your equalizer to compensate.

To do this analysis, you need a Real Time Analyzer (RTA) and a special microphone (or set of mikes) that the RTA can use. The RTA mike is omnidirectional, like your ears, and has a flat frequency response curve. The RTA generates a test noise, called pink noise, that you send through you amp into the speakers. The RTA mikes pick this up, and the RTA compares the pink noise output and the mike input. If there is any difference between the input and output, it means that the speakers and room are changing the sound. You then adjust your stereo's equalizer until the mike's input matches the pink noise. When that's done, your system is set up to perfectly reproduce recorded sound.

Anytime something in the room changes, like new furniture, or a lot of people in the room, or if you sit in a different place, you should do another RTA to ensure that the stereo is still giving you true sound.

Answer 2

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What is an RTA mic? What is it used for? What does it Measure?
How do you use it? For example, the dbx driverack pa uses an RTA mic?

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