Sound, Vibration & Acoustics Digest #8

To welcome you to 2015 here’s our latest collection of news articles, videos and other miscellaneous links on noise, sound, acoustics and vibration that have caught our eye over the past few weeks. We hope you enjoy them.

Sounds you can't hear can still hurt your ears

Sounds you can’t hear can still hurt your earshttp://news.sciencemag.org/biology/2014/09/sounds-you-cant-hear-can-still-hurt-your-earsExposure to inaudible low-frequency pitches changes the functioning of the inner ear

$240K Amps and More Grandiose Gear From the NY Audio Show | WIRED

$240K Amps and More Grandiose Gear From the NY Audio Showhttp://www.wired.com/2014/10/ny-audio-show/The latest whistle-stop on the stereophile circuit, New York Audio Show 14, recently took place in Brooklyn. As expected, there was enough audio porn crammed into 54 Marriott hotel rooms to make graybeards with deep pockets feel like young lions again. Here are some highlights.

7 Restaurants With Beautiful Acoustic Designs

7 Restaurants With Beautiful Acoustic Designshttp://resonics.co.uk/7-restaurants-with-beautiful-acoustic-designs/Acoustic consideration does not have to mean design compromise. See how these 7 global restaurants ingeniously integrated acoustics.

Waves on Vimeo

Waves on Vimeohttp://vimeo.com/12075151A long piece of rope represents three dimensionally a series of waves floating in space, as well as producing sounds from the physical action of their movement:…

Breakthrough: New kind of vibration sensor could give us ‘Spidey sense'

Breakthrough: New kind of vibration sensor could give us ‘Spidey sense’http://mashable.com/2014/12/10/sensor-spider-legs-spidey-sense/Scientists have modelled their latest sensor breakthrough on the unusual biology of “cracked” spider legs.

 

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Chris Mason

General Manager at Prosig
Chris' passion for software, technology and innovation began in his teens with a diet of Sinclair ZX80's, Commodore Pets and early Apple products. Chris graduated from Portsmouth Polytechnic in 1983 and went on to have a career in software product development, software team management, web development, marketing and, now, general management. His other passions include bicycles, IoT, coffee, running, walking, cooking and supercharged Jags.

3 thoughts on “Sound, Vibration & Acoustics Digest #8

  1. Mahabir Prasad

    I am pursuing my PhD program on “Study of dimensional Stone’s transient signal using Impulse Hammer”. The Specimen size starts from 1x1x1 meters and more. Can you help me to select the proper Force/Impact Hammer for these type of material and sizes. Should I select the Impulse Hammers or Impulse Sledge Hammer (issue of LbF range for such a big rocks). It will be sufficient to suggest possible lbf for this type of study.

    Do Prosig has solution for this type of study, there will be one Impuse hammer, 2 or more accelerometer to pick up transients from Material.

  2. James Wren

    Hello Mahabir,

    Thank you for posting a question on our blog.

    The size of the specimen is irrelevant, the mass of the specimen is the important factor.

    You would need to select a force instrumented hammer and an accelerometer that were of the correct operation range of the mass in question and the frequency ranges of interest.

    The Prosig P8004 data acquisition unit would meet your requirements perfectly, it is a 4 channel input unit designed for such projects.

    Additionally Prosig do have many years of experience with these projects and the selection of sensors for such. If you would like to discuss this project further, please get in touch with us directly at sales@prosig.com

    1. Mahabir Prasad

      You would need to select a force instrumented hammer and an accelerometer that were of the correct operation range of the mass in question and the frequency ranges of interest.
      – My frequency interest will be less than 8Khz, more useful will around 4-5 Khz. The Material is Marble – i.e. its weight is 1x1x1/12 feet = ~5Kg, Density 160-177 lbf/cube feet.
      Now you can suggest suitable type of instrumented sledge hammer etc.
      I already checked P8004, it is not useful due to already partial setup of Charge out, where as your device is IEPE suitable.

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