Adventures In Audio

Why do microphones sound different?

LEARN AUDIO ONLINE ► FREE TRIAL ►

Firstly, is there such a thing as a perfect microphone? How would we know that it is perfect?

Well, if you could record someone speaking, then play the recording back through a very accurate loudspeaker, probably an electrostatic, then you would have an excellent basis for a comparison test.

Simply compare the sound coming from the loudspeaker, blindfold, with the real live sound of your voice artist.

If you can't tell the difference, then the microphone is as perfect as it needs to be.

If you want to buy a near-perfect microphone, then you might start with DPA products, which are widely regarded as being very accurate.

But this isn't always the sound that we want. Usually we seek to achieve an up-front, 'larger than life' sound, for which imperfect microphones are often more appropriate.

Microphones that do not strive too hard for perfection nearly always sound different from each other. Even seemingly identical samples of the same model can show a difference.

So why do they sound different?

Firstly, the size and shape of the microphone - objects that are larger in size than the wavelength of the sound that strikes them have an effect on that sound. So at higher frequencies, the microphone interacts with the sound field and changes the sound it is trying to pick up.

Second, the grille. Try scratching the grilles of several microphones (gently, as you record) and compare the often huge differences in sound. This must be affecting the audio. We will find out by how much at some point in the not-too-distant future when we conduct a grille test. (George Foreman not invited.)

Third, the capsule. The capsule is the part of the microphone where the diaphragm is mounted. There are a variety of materials from which the diaphragm itself can be made, and methods of construction differ. This has a significant effect on the sound.

Fourthly, the internal amplifier of capacitor (condenser) microphones. These amplifiers tend to be very simple in design and often do not exhibit the ultimate in accuracy. Every degree of deviation from accuracy affects the sound.

Finally, the transformer. Most professional microphones have a transformer and those that do not have an electronic circuit that mimics the effect of a transformer. Transformers subtly, but often audibly, alter the sound quality.

In summary, we like mics that are accurate and near-perfect. We'd like more of them to be available.

But it's in the differences between imperfect microphones where much of the texture and interest in audio lies. Long may these differences continue and prosper!

Saturday October 3, 2020

The Audio Masterclass Music Production and Sound Engineering Course

FREE TRIAL

Ready to take your recording to the next level? Take a 30-day FREE TRIAL of the Audio Masterclass Music Production and Sound Engineering Course - Our most popular course.

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

David Mellor

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 Adventures In Audio.

Audio Masterclass gives you all the technical knowledge and skills to bring your musical dreams to life

The Audio Masterclass Music Production and Sound Engineering Course

Get the most from your studio with the Audio Masterclass Music Production and Sound Engineering Course.

Learn more...

Learn Pro Tools with our amazing range of video courses

Pro Tools video course catalog

Browse Pro Tools courses...

Learn Logic Pro with our amazing range of video courses

Logic Pro video course catalog

Browse Logic Pro courses...

Learn Cubase with our amazing range of video courses

Cubase video course catalog

Browse Cubase courses...

Audio Masterclass gives you all the technical knowledge and skills to bring your musical dreams to life

The Audio Masterclass Music Production and Sound Engineering Course

Get the most from your studio with the Audio Masterclass Music Production and Sound Engineering Course.

Learn more...

More from Adventures In Audio...

Making a perfect sine wave and animating it

Graphic equalizer demonstration using the Waves GEQ Classic

Harmonic enhancement: In the master or individual tracks? (Can you hear the difference?)

What will happen if your snare drum clips?

EQ demonstration HF bell boost

How much bass can a Bluetooth speaker produce?

One weird trick for monitoring your mix on a Bluetooth speaker

Can a preamp's pad work as a pop filter

Get the sound you want from the tools you have

What is the phase button for on a microphone preamplifier?

Choosing studio monitors - Is it your most important buying decision?

What is a channel strip? Why should you use one?

Audio effects explained - A quick guide for beginners

How to choose the best key for your song

The amazing stereo effect that no-one can hear

What is the best studio microphone?

Bad Audio Diary BAD 9: What's wrong with this picture?

Weird and wonderful sounds using the Air Music Tech Chorus plug-in

The end of latency?

An investigation of the pre-delay parameter of the Lexicon 480L reverb plug-in

Add reverb to your recordings using the natural echo chamber technique

Why you should ventilate your home recording studio

Q: What is your main concern if your interest is voice over?

Why do microphones sound different?