Vanstoja,
Thanks once more for coming back. Though I haven't read the original source -- my reply was misleading - it was your synopsis I enjoyed reading.
My curiousity was prompted by another thread where someone asked for a design of such a silencer. The 'traditional' approach seemed to be...
Vanstoja,
Perhaps alpha is the meaning of life.
Seriously -- thank you very much for this interesting reference. I enjoyed reading it and thinking.
This is one of the joys of the forum. Now and again it throws up far field stuff which gives you a 'Oh yeah' moment.
Again thanks.
Bob B
poetix99
Thank you for the references. I shall dig out my copy of Noise and Vibration control and see what it says. Again thanks for this useful reminder.
Much appreciated.
Bob B:-)
When steam under pressure discharges from a vent pipe it creates a noise.
Is anyone aware of a way of calculating the likely noise level given the diameter of the pipe and pressure of dicharge?
Bob B:-)
When steam under pressure discharges from a vent pipe it creates noise.
Is anyone aware of a way of calculating the likely noise level given the diameter of the pipe and pressure of dicharge?
Bob B:-)
When steam under pressure discharges from a vent pipe it creates a noise.
Is anyone aware of a way of calculating the likely noise level given the diameter of the pipe and pressure of dicharge?
Bob B:-)
BrianG
I award you:
The Thomas Edison Award for Elucidation
(In other words for bringing a great deal of light to bear on a subject which hitherto was shrouded in darkness).
Armed with your insights I feel confident of getting a positive outcome to my problem.
It is people like you who are...
BrianG
Thank you for your continued interest and suggestions in regard of this matter.
The PA is a transistor mixer amplifier with three inputs:
mic 1
mic 2
cartridge (don't know if this is magnetic? piezo?)
The amplifier has no auxillary input.
The amplifier is 25-30 years old.
SM57...
BrianG
What a pleasure to hear from you again and once more you are a bearer of riches.
The microphone normally used with this PA is a dynamic type -- from memory it's a Shure SM57.
I note your comment regarding experimentation -- the basis of all discovery.
Once more thank you for your...
BrianG
Thank you for this very informative and very interesting analysis. I will reflect on what you say -- and do some background reading on balanced circuits.
The tape recorder is battery operated so that simplifies things -- doesn't it?
Again thank you for your comments
Bob B:-)
cbarn
Thank you for this suggestion. I would be very grateful if could give a bit more detail e.g. possible values of resistances, number and circuit arrangement.
Again many thanks for taking the time to respond.
Bob B:-)
I wish to take the output from tape recorder earphone socket and feed the signal into the input of PA amplifier.
The PA input is 600 ohm balanced.
Welcome ideas -- direction how to go about matching the impedances and attenuating the signal.
B:-)
raceengineer
IRstuff hints at the challenges that lie ahead.
How often do you find that a solution begins to suggest itself once you have read round a subject.
I offer the following starting point to you. A useful primer on vibration measurement will be found at...
Thought the following may be of interest:
The full book citation is:
Noise and Vibration Control Engineering: Principles and Applications
Editors
Beranek and Ver
1992 Second Ed
A list of acoutical standards go to:
http://www.industrialacoustics.com/RDMETH.htm
For a description of carrying...
Visitor
Tutorial will be found at:
http://www.iguanalabs.com/resistors.htm
A nifty calculator found at:
http://www.dannyg.com/javascript/res2/resistor.htm
B:-)
Compuagent
Thank you for supplying the additional information which I found very informative. The use of cartesian co-ordinates was inspired. (In respect of the idler does the chain run to the left of a vertical line through the idler axis or to the right)?
I note that you report that the ‘...
Compuagent
First let me complement you for providing such a full technical description of your problem. A refreshing change which others using this and other forums should aspire to copy.
Real life problems such as these are challenging. While it is unlikely that anyone can dictate a solution...
