×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Acoustic properities measurement of Sandwich panel

Acoustic properities measurement of Sandwich panel

Acoustic properities measurement of Sandwich panel

(OP)
Hi,

I have a lot of questions but the following two questions are more urgent to me now.

I want to measure the acoustic properties of an ultralight sandwich material(totally only 1.2mm thick). My current plan is to use the impedance tube and two microphones method(ASTM E1050) to measure the absorption coefficient. But I also find another ASTM standard (C384). Can anybody tell me which method is better or easier to measure the absorption coefficient?

The second question is that I also want to measure the sound transmission loss(TL) of this material. But I find the ASTM standards for sound TL is manily used for building materials and need a large reverberation room. My material is mainly used in the truck industry and I also have not so big space and cost to do the measuremtn as the standard suggests. I wonder whether there are alternatives for the sound TL measurement.

Many Thanks.

RE: Acoustic properities measurement of Sandwich panel

Impedance tube is a waste of time for automotive stuff, IMNVHO. Use a TL suite, or install the material in a vehicle and measure the difference (a tricky process, to say the least).

Cheers

Greg Locock

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources