Transcript CSC391/691 Digital Video and Animation

Microphones
Feedback on
“Pied Beauty” Assignment
A good quality microphone for
voice recording
• Shure SM58
– Low impedance
– Cardioid pickup
Note: Wikipedia has a good article on microphone types. See
http://en.wikipedia.org/wiki/Microphone#Directionality
Specs of the SM58
from the Shure web page
The Shure SM58® unidirectional (cardioid) dynamic vocal
microphone is designed for professional vocal use in live
performance, sound reinforcement, and studio recording. A
highly effective, built-in, spherical filter minimizes wind and
breath "pop" noise. A cardioid pickup pattern isolates the
main sound source while minimizing unwanted background
noise. The SM58 has a tailored vocal response for a sound
which is a world standard. Rugged construction, a proven
shock mount system, and a steel mesh grille ensure that
even with rough handling, the SM58 will perform
consistently. Outdoors or indoors, singing or speech, the
SM58 is the overwhelming choice of professionals.
Specs of the SM58
from the Shure web page
Legendary Shure vocal mic tuned to accentuate the warmth and
clarity of lead and back-up vocals. Consistently the first choice of
performers everywhere. Cardioid, Dynamic.
•Shure SM58® Frequency response tailored for vocals, with
brightened midrange and bass rolloff
•Uniform cardioid pickup pattern isolates the main sound source
and minimizes background noise
•Pneumatic shock-mount system cuts down handling noise
•Effective, built-in spherical wind and pop filter
•Supplied with break-resistant stand adapter which rotates 180
degrees
•Legendary Shure quality, ruggedness and reliability
•Cardioid (unidirectional) dynamic
•Frequency response: 50 to 15,000 Hz
Other inexpensive mics
You might also use an inexpensive mic like
the one shown below, described at the Best
Buy web site.
Cyber Acoustics Stereo Headset with Removable NoiseCanceling Microphone ($24.99)
Specs of the Headset Mic from the
Best Buy web page
• 3-in-1 functionality serves as a PC headset, stereo
headphones and notebook microphone
• DCNT4 (direct noise-canceling microphone technology)
for enhanced vocal clarity
• Adjustable headband for added comfort
• Removable boom arm for use with your notebook
computer
• 30mm dynamic drivers deliver deep bass
• 7' shield cord with 3.5mm gold-plared plugs
• Frequency response: 20Hz - 20kHz headset, 100Hz 16kHz microphone
• Impedence: 32 ohms headset, 2.2 kOhms microphone
Impedance
• A low impedance mic is generally better.
• High impedance mics don’t perform well
over distances. They get interference and
loss of high frequencies
• Low impedance is less than 600 Ω
• Medium impedance is 600-10,000 Ω
• High impedance is greater then 10,000 Ω
Frequency Response
• Check your mic’s frequency response as
well
– Shure SM58 has a frequency response of 50
to 15,000 Hz
– Headset mic has a frequency response of 100
to 16,000 Hz
200 Hz
300 Hz
500 Hz
800 Hz
12,000 Hz 15,000 Hz