Natural Science Forum / Physics / Acoustics / June 2008

I am trying to do some fact finding on this type of eco-friendly system in
terms of noise sources.   My understanding is that the system comprises:
either a gas or diesel engine driven generator inside an acoustic enclosure
dry air cooler

Hi, everyone
In Cadna A, I am trying to translatory shifts the bitmap object, such
as Xnew=Xold-23, Ynew=Yold-15. However, when I use "modify object" ->
'transformation.." and set the new and old points' coordinates, the

    I'd like to determine when the term "Cafe Effect" came into use.
    This is the effect of increasing voice level when a persons in a group
are cnversing with one another in many sepaarate conversations (or
however you may choose to decsribe it).

In active noise cancelling systems for head-phones there seems to be
a
focus on ultra low frequent singularities (< a few Hz). Can anyone
tell me how these are related to some physical attributes of the

Inside square steel container filled with water (5mm thick), a piezo
transducer, immersed in the middle of the tank, transmits at 1MHz.
This generates plane waves propagating outside.
What’s happen to an acoustic PLANE WAVES propagating in the fluid when