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Phone
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Local &
National
301-253-1333
Washington Metro Area
301-840-0747
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RELOCATED
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The
Speaker Factory
Call For Appointment
Gaithersburg, MD 20882
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Hours
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Mon.
- Fri.:
10 a.m.- 6 p.m.
By
Appointment
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Glossary:
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THIELE-SMALL
PARAMETERS
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| Research
done in the study of loudspeakers has been conducted
by a number of individuals. The works of Neville Thiele
and Richard Small are considered to have had the most
impact on the loudspeaker design field. |
A method was found, so that one could
predict the frequency response performance of a loudspeaker
system, based on its physical characteristics.
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Re:
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The
D.C. resistance of the voice coil measured
in Ohms.
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Sd:
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The
surface area of the speaker's cone.
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Bl:
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The
magnetic strength of the motor structure.
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Mms:
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The
total moving mass of the speaker including
the small amount of air in front of and behind
the cone.
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Cms:
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The
stiffness of the driver's suspension.
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Rms:
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The
losses due to the suspension.
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By understanding the relationship
of these physical parameters and how to change them,
we may alter the response parameters to fit the
desired goal.
The
Thiele-Small Response parameters of a speaker are:
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Re:
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The
D.C. resistance of the voice coil measured
in Ohms.
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Sd:
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The
surface area of the speaker's cone.
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Fs:
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The
resonant frequency of the speaker's cone
and suspension system.
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Qes:
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The
electrical "Q" of the speaker.
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Qms:
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The
mechanical "Q" of the speaker.
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Qts:
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The
total "Q" of the speaker.
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Vas:
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The
volume of air having the same acoustic compliance
as the speaker's suspension.
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