Technical Library and Resources

Technical Papers by David Nelson

•Hard drive performance degradation due to high level noise in data centers, Internoise 2011, Osaka, Japan (co-author with Kent Green, IBM)

•A novel method for measuring highway barrier or retaining wall sound reflections in situ, Noise Con 2011, Portland OR

•Noise emission and power consumption estimation methods for fan-cooled equipment, Noise Con 2011, Portland OR.

•Impulse response characterization of anechoic and hemi-anechoic chambers, Acoustical Society of America, San Antonio, 2009

•Estimating noise emission from fan-cooled packages, Internoise 2009

•A Buy-Quiet program incorporating career-cycle noise costs, Internoise 2009

•The influence of cooling requirements, chassis design, and fan selection on noise emission, Semitherm 25

•A comparison of tonality metrics for product noise evaluation, Noise Con 2008

•Fan selection and installation issues related to spaceflight hardware, Noise Con 2007

•Cooling requirements, chassis design, and fan noise, Noise Con 2007

•Assessing the hidden costs of spaceflight hardware installation effects, Fan Noise 2007

•Residual loudness of wind turbine noise in the presence of ambient sound, Wind Turbine 2007

•Axial fan installation effects due to inlet flow distortions, Internoise 2006

•Effect of discharge duct geometry on centrifugal fan performance and noise emission, with William Butrymowicz and Chris Thomas, Noise Con 2005

•An automated system for the acoustical and aerodynamic characterization of small air-moving devices, with Jeff Schmitt and John Phillips, Noise Con 2005

•Acoustic Demonstrations II: Challenges to Speech Communication and Music Listening, with Beth Cooper and Richard Danielson, Noise Con 2004

•Noise emission testing requirements for spaceflight hardware, Noise Con 2003

•A computer-based acoustical measurement system for NASA Glenn Research Center, Noise Con 2003

•Computer Sound Quality: masking, prominence, and loudness, with Anne Balant, Noise Con 2000.

•Noise and vibration isolation design for a vibration testing laboratory, with Thomas Stewart of Cisco Systems, Noise Con 2000.

•NASA Glenn Research Center Reduced-Noise Design Guide, Internoise 99. .

•Low-frequency noise transmitted through walls: loudness and A-weighted level, Noise Con 96. Proves that there is no such thing as a "soundproof" partition.

•On quantifying and using the "diffraction effect" for cost- and performance-optimization of sound absorption treatments, . Noise Con 90. Why is the sound absorption coefficient sometimes greater than 1.00, and what does it mean? This effect has been re-discovered repeatedly over the years....

•Nonlinear Effects in Porous Materials (UT:ARL Thesis).

Organizations

advancing acoustics....

Supergraphics: feel free to download.....

Auditory Demonstrations I & II

NASA

Animated Auditory Demonstrations

Auditory Demonstrations II: Challenges to Speech Communication and Music Listening is a compact disc collection of auditory demonstrations that illustrate the impact of acoustical conditions and hearing loss on everyday listening situations. These audio demonstrations illustrate both the need for and the benefits of noise control efforts in a wide range of situations where good speech intelligibility is desirable. The disc was produced by the NASA Glenn Research Center Acoustical Testing Laboratory, with technical sound design and production contracted to Nelson Acoustics and studio engineering by Tequila Mockingbird Studios. The demonstrations are intended as tools with which engineers, architects, policymakers, and health care professionals may accurately and tangibly assess the true cost of communication interference due to noise and hearing loss.

In addition to the communication demonstrations, the CD includes recordings of several styles of music that have been modified to demonstrate auditory changes due to progressive noise-related hearing loss (included primarily for use in hearing conservation training programs).