Acoustics Research

Dr. Siu-Kit Lau (Eddie)

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A Major Element for Health, Wellbeing and Productivity of Staff

March 15, 2015 by Siu-Kit Lau

Acoustics in Offices:

— A Major Element for Health, Wellbeing and Productivity of Staff

Typical Business Operation Cost (Source:  http://www.worldgbc.org)

Typical Business Operation Cost (Source: http://www.worldgbc.org)

Recently, a new report from the World Green Building Council (WGBC) finds “overwhelming evidence” that office design significantly impacts the health, wellbeing and productivity of staff.

Staff costs typically accounts for 90% of business operating costs. A study in 1998 found that there was up to a 66% drop in performance for a ’memory for prose’ task when participants were exposed to different types of background noise. A follow-up study by the same authors in 2005 found that 99% of people surveyed reported that their concentration was impaired by office noise such as unanswered phones and background speech.

Background sound levels need to drown out unwanted distraction, but not be too loud to cause stress, therefore a background sound level of 45dBA is recommended in open plan offices. In private or cellular offices the background sound levels can be reduced to 40dBA. In both cases, any higher and that background sound itself risks becoming a distraction.

For more details about the report, it is kindly suggested to visit the link below.

http://www.worldgbc.org/activities/health-wellbeing-productivity-offices .

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Filed Under: News, Publication, Research Tagged With: Acoustics, Green Building, Office, Productivity

An investigation of acoustic treatment for children in a classroom of an elementary school

January 12, 2015 by Siu-Kit Lau

The South China Univeristy of Technology and Dr. Lau of Armstrong have compared the objective acoustic parameters and students’ subjective responses before and after an acoustic treatment in an elementary-school classroom. Acoustic treatment was done by installing sound absorption materials on the ceiling of the classroom for control of sound reverberation. The effects of reverberation time on children’s speech recognition have also been investigated. Results show that (1) the objective acoustic parameters in the classroom were obviously improved; (2) the subjective loudness of different types of noise sources, that students experienced in the classroom, were reduced; and (3) the speech intelligibility was significantly improved in the classroom after the acoustic treatment.

The article can be found from this link.

20141022_0723

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Filed Under: Publication, Research Tagged With: Acoustics, China, classroom, Green Building, green buildings, Journal, Measurement, university

Certificate of Reviewing from Applied Acoustics (Journal)

December 9, 2014 by Siu-Kit Lau

Elsevier Certificate 2014

Elsevier Certificate 2014

Dr. Siu-Kit (Eddie) Lau awarded a Certificate of Reviewing from Applied Acoustics (Journal).

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Filed Under: News, Publication, Research Tagged With: Acoustics, Journal

The 21st International Congress on Sound and Vibration in Beijing

July 24, 2014 by Siu-Kit Lau

The 21st International Congress on Sound and Vibration (ICSV 21) has been held in Beijing, China from July 13-17, 2014.  Dr. Siu-Kit Lau has presented a study of the acoustic comfort in the hospital of Palomar Pomerado Health (PPH).  The study has evaluated the effects of flooring and ceiling choices on controlling “corridor activity noise” in an occupied hospital.  Before the meeting, we had a gathering with Prof. Jian Tian (Chairman of ICSV 21), Prof. Jian Kang (University of Sheffield), Prof. Joseph Lai (University of New South Wales), Mr. Maurice Yeung (HK-EPD), Dr. Siu-Kit Lau and many others.

Prof. Jian Tian, Prof. Jian Kang, Prof. Joseph Lai, Maurice Yeung, Dr. Siu-Kit Lau and many others

Prof. Jian Tian, Prof. Jian Kang, Prof. Joseph Lai, Maurice Yeung, Dr. Siu-Kit Lau and many others

Prof. Jian Tian, Prof. Jian Kang, Prof. Joseph Lai, Maurice Yeung, Dr. Siu-Kit Lau and many others

Prof. Jian Tian, Prof. Jian Kang, Prof. Joseph Lai, Maurice Yeung, Dr. Siu-Kit Lau and many others

Prof. Jian Tian, Prof. Jian Kang, Prof. Joseph Lai, Maurice Yeung, Dr. Siu-Kit Lau and many others

Prof. Jian Tian, Prof. Jian Kang, Prof. Joseph Lai, Maurice Yeung, Dr. Siu-Kit Lau and many others

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Filed Under: Conference/Meeting, Presentation, Publication, Research Tagged With: Acoustics, Hospital

学校建筑室内环境研究中心成立 改善学校声学环境

July 1, 2014 by Siu-Kit Lau

学校建筑室内环境研究中心成立 改善学校声学环境 (中国教育在线)

http://career.eol.cn/gong_si_ming_pian_4368/20140630/t20140630_1143582.shtml

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Filed Under: Research Tagged With: Acoustics, classroom, education, Green Building, university

School Building Indoor Environment Research Center (学校建筑室内环境研究中心)

June 29, 2014 by Siu-Kit Lau

“School Building Indoor Environment Research Center” has been founded on May 26, 2014.  The aim of this center is to offer advanced research to support the movement of green campus and improvement of indoor environmental quality of the learning facilities/classrooms.  Acoustic committee has been established at the same date, which members include:

  • Prof. Wu Shuoxian (South China University of Technology)
  • Prof. Zhao Yuezhe (South China University of Technology)
  • Prof. Peng Jianxin (South China University of Technology)
  • Prof. Yan Xiang (Tsinghua University)
  • Prof. Mao Dongxing (Tongji University)
  • Prof. Xie Hui (Chongqing University)
  • Lily Wang (University of Nebraska-Lincoln)
  • Dr. Ou Dayi (Huaqiao University)
  • Dr. Siu-Kit (Eddie) Lau (Armstrong)

The ceremony and kick off meeting were held in Beijing on May 26, 2014.

Group photo with Professors

Group photo with Professors

Photo of Dr. Siu-Kit (Eddie) Lau

Photo of Dr. Siu-Kit (Eddie) Lau

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Filed Under: Research Tagged With: Acoustics, classroom, education, Green Building, university

Carl Hart obtained his PhD

June 9, 2014 by Siu-Kit Lau

Carl's hooding

Carl and Dr. Lau

Congratulations to Carl Hart, who successfully obtained his Ph.D. with his dissertation entitled “On a Combined Adaptive Tertrahederal Tracing and Edge Diffraction Model”.  His major advisor was Dr. Siu-Kit Lau. Carl is currently a post-doctoral research position with the US Army Corps Research Lab in Hanover, NH, where he’ll be working on outdoor noise under Dr. Keith Wilson.  He was hooded by Dr. Lau in the Nebraska night in the ASA meeting in Providence, RI on May 7.

Carl's hooding #1

Carl’s hooding by Dr. Lau

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Filed Under: Research Tagged With: Carl Hart, Graduate, PhD

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