The sE Electronics Reflexion Filter in a noisy environment

David Mellor

David Mellor is CEO and Course Director of Audio Masterclass. David has designed courses in audio education and training since 1986 and is the publisher and principal writer of

Tuesday March 26, 2013

If a picture is worth a thousand words, then a clip of audio must be worth at least a million. Here's the audio, by a newly-starting Audio Masterclass student, his diagnostic piece for analysis...

The recording is very good in many respects. The mic is a Rode K2 by the way - a true large-diaphragm mic. The student comments that he used an sE "vocal booth", by which I assume he means the sE Electronics Reflexion Filter, which has achieved a certain level of popularity.

Now I have nothing against this device. I'm a firm believe in 'every little helps' and that small improvements in one's recording setup can lead to very useful improvements in audio quality.

However, the problem arises when people think that devices such as this can work miracles. To be fair, working miracles is nowhere to be found in sE's sales literature. But sometimes expectations can get carried away.

This device can help improve the dryness of a recording. A dry recording without ambience is always easier to work with than an ambient recording. This is most significant for speech and popular music vocals, and almost anything recorded in a small room.

Since much of the mic is surrounded by a sector of a kind of a Dyson Sphere, then ambient sound from these directions is attenuated. Some ambience will remain from parts of the mic not surrounded by the filter.

But noise is trickier. Noise will find a way around any barrier. Only if a barrier is totally surrounding, with no leakages, will noise be reduced to a truly significant extent. The sE Reflexion Filter can reduce ambience to a useful degree. Against noise it is less effective.

In this clip we can clearly hear the fan of the MacBook Pro used to make the recording. Basically, the computer needs to be in another room - that is the only complete solution.

You could ask the question why the filter should be better with ambience? After all, ambience and noise are both sound. How can the filter affect them differently?

The answer is that the ambience is to an extent masked by the direct sound. In contrast, during gaps between words, the noise isn't masked at all.

In summary, whatever you can do to control both ambience and noise is worthwhile. But miracles, well if they really did happen there would be a tax on them, wouldn't there?

Like, follow, and comment on this article at Facebook, Twitter, Reddit, Instagram or the social network of your choice.

Come on the Audio Masterclass Pro Home Studio MiniCourse - 60 great hints and tips to get your home recording studio MOVING

It's FREE!

Get It Now >>

An interesting microphone setup for violinist Nigel Kennedy

Are you compressing too much? Here's how to tell...

If setting the gain correctly is so important, why don't mic preamplifiers have meters?

The Internet goes analogue!

How to choose an audio interface

Audio left-right test. Does it matter?

Electric guitar - compress before the amp, or after?

What is comb filtering? What does it sound like?

NEW: Audio crossfades come to Final Cut Pro X 10.4.9!

What is the difference between EQ and filters? *With Audio*

What difference will a preamp make to your recording?

Watch our video on linear phase filters and frequency response with the FabFilter Pro Q 2

Read our post on linear phase filters and frequency response with the Fabfilter Pro Q 2

Harmonic distortion with the Soundtoys Decapitator

What's the best height for studio monitors? Answer - Not too low!

What is the Red Book standard? Do I need to use it? Why?

Will floating point change the way we record?

Mixing: What is the 'Pedalboard Exception'?

The difference between mic level and line level

The problem with parallel compression that you didn't know you had. What it sounds like and how to fix it.

Compressing a snare drum to even out the level

What does parallel compression on vocals sound like?

How to automate tracks that have parallel compression

Why mono is better than stereo for recording vocals and dialogue