Acoustic Guitars Three Characteristics
Acoustic Guitars
Acoustic Guitars: Three Characteristics
Almost as important as the design of the guitar is the acoustics
themselves, which is enabled and enhanced by the types of materials,
design and relatively important manufacturing secrets and construction
features.
For the most part, three main features are identified that contribute to
these characteristics of the guitar. They are
Coupling
Material Composition
Plate Bracing
The term coupling is referring to when two vibrating objects, surfaces
and patterns connect, intermingle and vibrate together, absorb and
resonate. Energy displacement, from the source or impetus for the sound,
namely plucking a string with your finger (or picked, strummed) the sting
and bridge vibrate, stimulating the soundboard, traveling as airwaves and
vibrations into the internal air cavity, of the guitar, travels around
inside the sound-box, vibrating against the sides and back and keeps on
going. If the components, individually and collectively work and connect,
resonate and sound good, vibrate together, great music is to be made from
and with it. When all the individual elements and sound wave patterns
work well together, guitar is in tune, then the system is said to be
coupled together and working well.
The guitar sound-box or body, actually acts as a channeling avenue for
the sound, converting high pitch, high pressure vibrations at the bridge
into low pressure vibrations in the surrounding air. It matches
“impedance?. Higher sounds are created through stings and bridge,
soundboard flow. Lower sounds are created through internal
The higher frequency (pitch) sounds are produced by string interaction
with the bridge and then the sound board, whereas the lower frequencies
are essentially driven by the internal air cavity/sound hole and
ribs/back coupling effects:
How the vibrations flow, can also give some resonance frequency and how
the strings are played can also have an effect or secondary influence on
what the sounds will actually be.
Coupling between the different guitar parts will depend on a couple of
factors, like which kinds of material are used, where they are places,
math/geometry principles and the science of sound and frequency,
resonance and playing techniques.
How these different parts come together is almost similar to how
instruments play together in an orchestra, each having its part to play,
forming a beautiful, resounding symphony of sound, song and music! If
there is too much ?coupling? sounds will be harsh-sounding and not
pleasant on the ear, despite best-effort tuning.
Construction, materials and resonance symmetries, as well as bracing ,
even how the sides and top/back plates are connected, bridge type and
placement, even glue or adhesive will all affect the final tone and
sound-quality of the instrument. Sound-holes are resonators of the
created sounds. Acoustics are also dependent on material Composition
(more on that later).







