Jack Chong

6 Questions 2 Answers 0 Followers

Questions related from Jack Chong

Elbow and Its Insertion Loss (Acoustic). What is the definition of elbow?

Hi everyone, I have a query regarding the elbow and its insertion loss captured in ASHRAE. The elbow captured in the ASHRAE is referring to what kind dimension? I have attached three common...

29 November 2021 8,078 4 View

Architecture acoustic , mechanical & HVAC noise, vibration isolater, rain impact noise references?

Dear fellow friends, are there any good and PRACTICAL references for above subject matter? which can show real life problems and calculations. Thanks

25 April 2020 7,421 1 View

Damping ratio is always the parameter that determine with greatest degree of uncertainty?

Any reason why so difficult to determine damping ratio?

06 June 2018 842 17 View

Damping ratio is always the parameter that determine with greatest degree of uncertainty?

Any reason why so difficult to determine damping ratio?

06 June 2018 1,775 16 View

Damping Ratio between EMA and OMA?

Hi guys, when I try to compared the results from OMA test and EMA test, I found out that percentage of natural frequencies is quite small and good MAC values are actually observed. But the...

11 November 2017 4,659 1 View

What is meant by "monophase" excitation vector and "monophase" response vector?

Hi everyone, I came across the term "monophase" excitation vector and "monophase" response vector. Can anyone explain the term in details?. thanks =)

05 May 2016 6,376 0 View