This paper studies the cases of two schools, which faced the acoustics challenges and how it was overcome. Cesar Chavez Education Center faced steep acoustics challenges. Thorburn Associates and VBN Architects met the challenges using environmentally safe acoustic products. In 2001, Elkhorn Village Elementary School launched a modernization project, which...
Addressing occupant concerns about background noise and privacy improves workplace comfort and productivity. Commercial tenants know what Class A space looks like when they see it. They also know that there is more than meets the eye — such as good acoustics. Noise and the absence of acoustic privacy are...
When people purchase units, apartments or flats, the furthest thing from their minds is probably the issue of acoustics. It's not until they move in and are faced with these everyday living issues that the importance of acoustics within units and - more importantly - acoustic insulation from their neighbors,...
Whether in quiet suburbs or clamorous cities, apartment and office dwellers share a common interest: insistence on protection against noise from the neighbors, from traffic, from playgrounds and from scores of other sources. Proper insulation against intruding sound is therefore imperative in any high-quality multi-unit project. This paper is designed...
This paper presents a survey of significant steps towards the development of a CFD/CAA hybrid methodology aiming at the numerical prediction of the aerodynamic self-noise of complex 3D airfoils. This approach is based on the combination of several up to three numerical methods, each one simulating specific fluid mechanisms (unsteady...
Among the funded projects that aim at developing a new concept of tilt-rotors, the pre-competitive ADYN project (Advanced European tilt-rotor for Dynamics and Noise) has the objective to study the dynamic and acoustic problems of the ERICA concept proposed by AGUSTA. This paper presents the work package 3 (WP3) of...
The RB211 gas turbine package matches a Rolls-Royce gas generator to either a Cooper-Bessemer RT56, RT62 or RT61 power turbine. Auxiliaries such as intake air filtration, acoustics, lubrication, starting and wash systems are all part of the Rolls-Royce scope of supply. A primary factor in the success of the industrial...
Creating an acoustically favorable classroom environment requires a properly defined acoustical goal, accurate sound data, acoustical analysis, detailed specifications, and careful construction. HVAC equipment is one critical element to consider during this process. This document explains how HVAC equipment can be located in the classroom itself, near the classroom, or...
This paper gives details about Deskstar Drives which are used to reduce power consumption. Deskstar drives enable very desirable attributes for both hard drives and the systems that use them. The Deskstars can be configured to reduce both audible noise and reduce power demands. Whenever the system is located near...
A source-to-far-field computation chain aiming at predicting the noise generated by rotor-stator fan interactions and radiated from the inlet is presented here. It is applied to the NLR turbofan model, tested in DNW-LLF anechoic chamber in the framework of DUCAT project. Unsteady aerodynamics required for acoustics are assessed using a...
Sound Solutions represented some of the best thinking at the time by interior designers and industry as to how various products in the office environment could work together to address the problem of noise. This paper explains, today's office environment is much more acoustically complex, and the solutions needed to...
The control of air flow rate in VAV systems is important for several reasons, including acoustics, ventilation, energy management and occupant comfort. Most VAV terminals today are supplied with pressure independent controllers of some type (pneumatic, analog electronic and digital electronic), and all require an inlet flow sensor supplied by...
Digital waveguide mesh models have provided an accurate and efficient method of modeling the properties of many resonant structures, including acoustic spaces. 2-D rectilinear and triangular mesh structures have been used extensively in the past to model plates and membranes and as potential analogues to 2-D acoustic spaces. This paper...
Students and teachers in Red Wing, Minnesota are enjoying a new high school that uses the latest in efficient, quiet HVAC technology to provide optimal indoor air quality. While the increase in outdoor air supply could not come too soon for those who are sensitive to poor indoor air quality,...
Located in the Fort Worth, Texas suburb of North Richland Hills, Birdville High School BHS makes a real presence among the expanding residential and commercial areas developing around it. By marrying the benefits of geothermal (ground-source) heating and cooling with Trane horizontal and vertical ground-source heat pumps and a Tracer...
The Music Hall has been a focal point in Oklahoma City for over six decades. Constructed of a very pale, fine-grained limestone, the building exterior is a strongly rectangular design with massive fluted pilasters, large lobby windows, and medallion-like relief carvings along the upper façade. Like the exterior, the building's...
Cold-formed steel has been widely used in commercial buildings, especially in non-load bearing partitions and curtain wall applications. This report investigates regulatory requirements, available test data, and typical practices relating to acoustics and fire protection of cold-formed steel framing. This document starts by providing an overview of fire and acoustic...
When the acoustic performance standards for the air handling equipment were set, we didn't think we could achieve it with cataloged equipment. Consulting engineer James Stewart describes one of the major acoustic challenges in the design for the recently-renovated Civic Center Music Hall in Oklahoma City. A major part of...
Erdman Anthony designed mechanical and electrical renovations for the Hochstein School of Music, a premier performing arts institution dedicated to providing music and dance opportunities for the community. This unique facility is comprised of three buildings, two of which formerly served as churches. Renovations focused on implementing state-of-the-art features in...
Desert Samaritan Medical Center in Mesa, Arizona, describes the urgency for a facility expansion. The expansion to the existing 550,000 square-foot facility would include an air handler system to be served by an existing chilled water plant. The HVAC system design, developed by mechanical engineer Bridgers & Paxton of Phoenix,...
