BY ARTUR SHAMSUTDINOV
WEEK 1 OF INTRODUCTION TO MUSIC PRODUCTION AT COURSERA.ORG
My name is Artur Shamsutdinov.
This lesson is for week 1 of Introduction To
Music Production at Coursera.org.
Today I want to talk to you about Microphone
WHAT IS A MICROPHONE?
Microphone is an acoustic-to-
electric transducer or sensor that
converts sound into an electrical
Dynamic microphones (also known as magneto-
dynamic microphones) work via electromagnetic
induction. They are robust, relatively inexpensive
and resistant to moisture. This, coupled with their
potentially high gain before feedback, makes them
ideal for on-stage use.
A condenser microphone is a microphone that uses a capacitor to
convert the compression and rarefaction of sound waves into electrical
Condenser microphones require power (voltage) in order to operate.
This voltage is know throughout the recording industry as “phantom
power”, and is present on most professional mixing boards, recording
consoles, and audio interfaces (it may be written as “48V” or “+48”, etc)
Because condenser microphones require power, they are generally
much more sensitive than dynamic microphones. In addition, they
usually have a much broader frequency response, faster transient
response, and a hotter output than dynamic microphones.
A microphone's directionality or polar
pattern indicates how sensitive it is to
sounds arriving at different angles
about its central axis.
A frequency response diagram plots the microphone
sensitivity in decibels over a range of frequencies (typically
20 Hz to 20 kHz), generally for perfectly on-axis sound
(sound arriving at 0° to the capsule). Frequency response
may be less informatively stated textually like so: "30 Hz–16
kHz ±3 dB". This is interpreted as meaning a nearly flat,
linear, plot between the stated frequencies, with variations
in amplitude of no more than plus or minus 3 dB.