Quote:
Originally Posted by Poppyhome
What is a higher resonant frequency, what does acoustic feedback sound like, and is there a study on how it effects audio sound for the worse.
What about all the sound waves bouncing around the room and hitting the poor turntable or component with a direct hit? 
Ron |
Acoustic feedback usually sounds like a low/mid-low frequency "howl" as it cycles from the speakers which in turn resonates the turntable and back through the speakers. Depending on the volume setting, it can quickly increase in intensity resulting in damage if immediate action isn't taken. When it occurs, it's unmistakable.
Different turntable locations can have dramatic effects on the amount of feedback being introduced into the system (at a given volume setting), ie: such as in corners where bass is most pronounced or simply from the turntable being too close to the speaker(s).
Most reasonably good turntables will not be affected by the predominant frequencies in most music because they are too high however in some rare cases a low tone (if it's loud enough) can trigger mechanical resonance, thus initiating audible feedback. In less severe cases, the low tone will continue longer (hold on) through the speakers even though it had stopped in the music.