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array microphones

Home / directional microphones / array microphones

An array microphone (sometimes called a microphone array) is a microphone system whose output is obtained by array processing of the signals from at least two individual microphones.

Some array microphones are capable of amazing things.  For example, they can provide a sharp polar pattern that can be electronically steered toward whomever is speaking around a conference-room table.  And large array microphones can provide very high directivity that facilitates capturing sound at long ranges.  But those types of array microphones are neither easy nor cheap to build.

However, array microphones don’t have to be complex or expensive to be useful.  Specifically, simple array configurations can be used to make studio microphones that rival the performance of commercial microphones costing much more, and that’s going to be the focus of most of the posts in this category.

Small arrays can provide two benefits in a studio microphone application:

  • An array can have a higher Signal-to-Noise Ratio (SNR), or equivalently a lower self-noise, than that of the individual microphone elements.  So, a small array of inexpensive microphone elements can be used to make a studio microphone with lower self-noise than expensive commercial units.
  • An array can be used to electronically synthesize all of the main polar patterns used in studio microphones: cardioid, supercardioid, hypercardioid, and bidirectional.

Even better, both of the above benefits can be combined to yield a low-noise studio microphone with an electronically switchable polar pattern.

Illustration of three types of array microphone: a planar array, a linear array, and an end-fire array
array microphones | directional microphones

How array microphones work

ByDIYmicguy October 23, 2020January 27, 2023

An array microphone, sometimes called a microphone array, consists of multiple microphone elements whose outputs are electronically processed to provide a greater Signal-to-Noise Ratio SNR) and a sharper polar pattern than the individual elements. There’s…

Read More How array microphones workContinue

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  • Home
    • Blog
    • About the DIY mics guy
    • Contact
  • microphone basics
    • microphone design
      • Basic DIY microphone design—Part 1: the microphone design process
      • Basic DIY microphone design—Part 2: microphone front-end design
      • Basic DIY microphone design—Part 3: microphone back-end design
      • Why you shouldn’t rely on microphone plug-in power
      • The 7 best microphone elements for cost-effective DIY microphones
      • How to use Electret Condenser Microphones
    • microphone performance
      • The 4 key microphone specifications and why they’re important
      • Predicting microphone performance—Part 1: what is microphone SINR?
      • Predicting microphone performance—Part 2: using the SINR
      • Predicting microphone performance—Part 3: microphone range prediction
  • directional microphones
    • How long-range microphones work
    • shotgun microphones
      • A deep look at how shotgun microphones REALLY work
      • The history of the shotgun microphone
    • horn microphones
      • How horn microphones work
    • parabolic microphones
      • The complete guide to parabolic microphones
      • I bought a small parabolic microphone for just 40 dollars off the web, and it really works…sort of
      • The Klover MiK 09: can a small parabolic microphone outperform a shotgun microphone?
    • array microphones
      • How array microphones work