Tag Archives: Noise Control

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You can make a difference. Applied Technology Institute is scheduling new courses for September 2016 through July 2017. Please let us know which courses you would like to see on our schedule or brought to your facility.

·         If you have a group of 3 or more people, ATI can schedule an open enrollment course in your geographic area.

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On-site training brings our experts to you — on your schedule, at your location. It also allows us to plan your training in advance and tailor classes directly to your needs.

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Do You Resonate with Shock, Noise and Vibration?

Negative Stiffness Vibration Isolator

 

Video Clip: Click to Watch

Two Short Courses from ATI on Vibration, Shock or Noise

in Vehicles, Devices, and Equipment

If you are concerned with vibration, shock or noise in vehicles, devices, and equipment; then Applied Technology Institute (ATI) short courses maybe for you.

Why not take a short course?

Our short courses are less than a week long and are designed to help you keep your professional knowledge up-to-date. They provide a practical overview of space and defense technologies which furnish a strong foundation for understanding the issues that must be confronted in the use, regulation and development of complex systems.

If you are test personnel who conduct or supervise or “contract out” vibration and shock tests, then take the three-day course fundamentals course. It also benefits design, quality and reliability specialists who interface with vibration and shock test activities.

If you have some prior acquaintance with vibration or noise fields, then you should sign up for the more advanced four day course. It emphasizes understanding of the relevant phenomena and concepts in order to enable the participants to address a wide range of practical problems insightfully.

See sections below for more details on these two short courses from ATI.

FUNDAMENTALS OF RANDOM VIBRATION & SHOCK TESTING

This three-day course is primarily designed for test personnel who conduct or supervise or “contract out” vibration and shock tests. It also benefits design, quality and reliability specialists who interface with vibration and shock test activities.

From this course you will obtain the ability to understand and communicate meaningfully with test personnel, perform basic engineering calculations and evaluate tradeoffs between test equipments’ and procedures.

Each student receives the instructor’s brand new, minimal-mathematics, minimal-theory hardbound text Random Vibration & Shock Testing, Measurement, Analysis & Calibration. This 444 page, 4-color book also includes a CDROM with video clips and animations.

What you will learn:

• How to plan, conduct and evaluate vibration and shock tests and screens.

• How to attack vibration and noise problems.

• How to make vibration isolation, damping and absorbers work for vibration and noise control.

• How noise is generated and radiated, and how it can be reduced.

VIBRATION & NOISE CONTROL

This course is intended for engineers and scientists concerned with the vibration reduction and quieting of vehicles, devices, and equipment. The course will provide guidance relevant to design, problem solving, and development of improvements.

It will emphasize understanding of the relevant phenomena and concepts in order to enable the participants to address a wide range of practical problems insightfully. The instructors will draw on their extensive experience to illustrate the subject matter with examples related to the participant’s specific areas of interest.

Although the course will begin with a review and will include some demonstrations, participants ideally should have some prior acquaintance with vibration or noise fields. Each participant will receive a complete set of course notes and the text Noise and Vibration Control Engineering, a $210 value.

What you will learn:

How to attack vibration and noise problems

What means are available for vibration and noise control?

How to make vibration isolation, damping, and absorbers work

How noise generated and radiated, and how it can be reduced?

Course Outline, Samplers, and Notes

Determine for yourself the value of these courses before you sign up.

• Fundamentals of Random Vibration & Shock Testing course slide sampler

• Vibration & Noise Control course slide sampler

Our other short courses are designed for individuals involved in planning, designing, building, launching, and operating space and defense systems. See our samples (See Slide Samples) on some of our courses.

Or check out the new ATI channel on YouTube.

After attending a course you will receive a full set of detailed notes from the class for future reference, as well as a certificate of completion. Please visit our website for more valuable information.

About ATI and the Instructors

Since 1984, ATI has provided leading-edge public courses and onsite technical training to DoD and NASA personnel, as well as contractors. Whether you are a busy engineer, a technical expert or a project manager, you can enhance your understanding of complex systems in a short time. You will become aware of the basic vocabulary essential to interact meaningfully with your colleagues.

Our mission here at ATI is to provide expert training and the highest quality professional development in space, communications, defense, sonar, radar, and signal processing. We are not a one-size-fits-all educational facility. Our short classes include both introductory and advanced courses.

ATI’s instructors are world-class experts who are the best in the business. They are carefully selected for their ability to clearly explain advanced technology.

Fundamentals of Random Vibration & Shock Testing course

Wayne Tustin has since 1995 been president of a specialized engineering school and consultancy he founded in Santa Barbara, CA. His BSEE degree is from the University of Washington, Seattle. He is a licensed Professional Engineer – Quality in the State of California. Wayne’s first encounter with vibration was at Boeing/Seattle, performing what later came to be called modal tests, on the XB-52 prototype of that highly reliable platform. Subsequently he headed field service and technical training for a manufacturer of electrodynamic shakers, before establishing another specialized school on which he left his name. Wayne has written several books and literally hundreds of articles dealing with practical aspects of vibration and shock measurement and testing.

Vibration & Noise Control course

Dr. Eric Ungar has specialized in research and consulting in vibration and noise for more than 40 years, published over 200 technical papers, and translated and revised Structure-Borne Sound. He has led short courses at the Pennsylvania State University for over 25 years and has presented numerous seminars worldwide. Dr. Ungar has served as President of the Acoustical Society of America, as President of the Institute of Noise Control Engineering, and as Chairman of the Design Engineering Division of the American Society of Mechanical Engineers. ASME honored him with its Trent-Crede Medal in Shock and Vibration. ASA awarded him the Per Bruel Gold Medal for Noise Control and Acoustics for his work on vibrations of complex structures, structural damping, and isolation.

Dr. James Moore has, for the past twenty years, concentrated on the transmission of noise and vibration in complex structures, on improvements of noise and vibration control methods, and on the enhancement of sound quality. He has developed Statistical Energy Analysis models for the investigation of vibrations and noise complex structures as submarines, helicopters, and automobiles and has been instrumental in the acquisition of corresponding data bases. He has participated in the development of active noise control systems, noise reduction coating and signal conditioning means, as well as in the presentation of numerous short courses and industrial training programs.

Times, Dates, and Locations

Fundamentals of Random Vibration & Shock Testing

Sep 20-22, 2011 Detroit, MI

Oct 4-6, 2011 Santa Clarita, CA

Nov 7-9, 2011 Acton, MA

Vibration & Noise Control

Sep 26-29, 2011 Boston, MA

Mar 12-15, 2012 Columbia, MD

Apr 30-May 3, 2012 Boston, MA


 


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Home Low-Frequency Hum – House Is Literally Humming

The issue of home low frequency hum is discussed on several blogs. I did some searches om Home Hum Noise

RE: House is humming, literally

* Posted by kevin2009 (My Page) on
Fri, May 1, 09 at 18:22

Have had exactly the same problem.
Problem so bad its been giving neighbours headaches-sleep pattern deprivation etc etc.
A low resonant humming getting stronger at night etc etc.
Not caused by traffic,electricity etc.
Humming caused by water pipe vibrations causing all sorts of low frequency bass like wooing noises.
Have found the problem tonight – pressure variance in water mains pressures.Too much pressure causes pipes to hum.
Possible causes – pumping station pressures too high – pressure reducing valves malfunctioning – mains pipes causing transient noise due to a “Dead end” section of the mains pipe.

Symptoms that can be checked – when the hum is at its loudest turn one of your taps on – the hum may reduce if the pressure lessens in the mains supplying the house – have you noticed any high flow/pressure rates from your taps?
Not certain but a loss of water pressure may have similar properties also.

If in doubt get your water utility company to do a flow/pressure check on the mains /in your house etc.

The turning tap on trick will only work if its sufficient to
reduce the mains pressure – if not try to get neighbours etc to turn theirs on at the same time etc.

I live in england in wales in Newport.
I will now update my posts when the utility company is made aware of the cause of my problem and tells me how they are going to fix it.

This is a problem with humming that for me has been caused by mains water supply pressure problem – not necessarily your problem.Simply turning the stop cock to your house off is not enough – the problems still there because the pipes are still singing to the pressure problem.

Hope this helps somebody.

RE: House is humming, literally

* Posted by peachiepie (My Page) on
Tue, Jun 23, 09 at 17:31

Wow, I do not believe that so many people has the problem I have been having for three years. I am amazed when someone suggests tinnitus. I have explained I hear humming, not ringing. It is a sound and not a noise. Mine sounds like a low hum of a refrigerator or a motor lowly idling.

I have had plumber, water, gas, power, and anybody else you can imagine here in my house in Georgia. This is a 1970s house and the hum began about two weeks after having a new water heater installed. The pressure was too high and the plumber came in and corrected it. Two weeks later, the hum began.

I don’t get a complete night’s sleep at all. What little sleep I get comes from le4aving the tv on late and then turning the radio on. Now, I can run the attic fan all night so I don’t have to hear it.

Some people have heard it and others haven’t. I stopped mentioning it for fear people thought I was losing my great mind-lol. People still ask me time to time if I still hear it. I tell them yes. When the power is out, it’s just me and the hum. Drives me nuts. It is 24/7, never stops and in every room of my house. You can’t escape it.

I had a client in my office and he asked, “what is that”. I said, oh you hear that. He said yes, what is it. I said, I wish I knew.

There are a couple of things here that’s given me some hope. I will try the water trick, though I believe my plumber did all of thesse things. I will have the telephone company come out to check the lines. Everything else, I believe I have done.

Good luck to all of us living with this in all areas of the country.

Peachie