please give me some details for my physics project for boards on transducers.
amplification to understand how the mechanical vibrations created in guiter string become electrical signals which can be fed into speaker.
the wood of the guitar at the bridge and headstock. The frequency of the vibrations is
preserved, and the guitar body accepts this energy with a strong frequency response. This
means that string vibrations that agree with the structural resonance frequencies of the
guitar body make the guitars wood components also vibrate with the same frequencies.
When these special resonance frequencies are excited, the air inside the body cavity
undergoes pressure changes and radiates a travelling pressure wave of said frequencies
from the guitars sound hole. Therefore, notes played within the resonant frequency
range will be fuller, richer, and louder than notes that do not excite the guitar body.
test used a piezoelectric transducer to excite the guitar bridge and then a second
piezoelectric to pick up those excitements elsewhere on the face of the guitar.
Piezoelectrics have the property that alternating currents cause the material to vibrate
with the frequency of those current alternations. This transducer was planted directly
onto the sound board beside the bridge with a small weight to attempt to couple the
vibration to the sound board.