Abstract
Acoustic diffusers
An acoustically diffusing surface is one that scatters sound in all directions rather than giving a single “specular” reflection like a mirror.
This scattering of sound gives a good mix of sound and is particularly beneficial for music as it allows the listener to feel enveloped in the sound. In classical concert halls, a diffuse sound field was provided by the architectural modeling and stucco work. The acoustical benefits of this were not understood at the time and this was a complete stroke of luck on the designers’ part. In more modern spaces, diffusion is provided by specialist acoustic diffusers.
Diffusion makes a space sound bigger, so it is useful in smaller rooms such as recording studios. It is also beneficial in regular shaped rooms to help break up standing waves/room modes.
For more information, visit http://www.totalvibrationsolutions.com/page/288/Acoustic-Diffusers.htm
Acoustic wall solutions
Walls often require acoustic treatment to prevent the passage of sound from one internal room to another or between dwellings. The Total Vibration Solutions (TVS) portfolio caters for all airborne and noise control requirements when specifying wall treatments. This includes both high-performance isolation products and damping materials.
For more information, visit http://www.totalvibrationsolutions.com/page/107/Acoustic-Wall-Solutions.htm
SW series impedance tubes
SW series impedance tubes can accurately measure sound absorption coefficients and impedance according to standards described in ISO10534-2 (1998). They are based on the Transfer Function Method, which is much faster than the commonly used Standing Wave Ratio Method.
The SW series Impedance Tubes are specially designed not only to work with the cut samples but also for direct use in the field. The small size and durable aluminum construction make it easy to transport and be used for estimating the properties of walls, ceilings, installed building materials, road surfaces, different ground surfaces, and interiors of vehicles.
BSWA offers the complete set of Impedance Tube system, which includes the tubes, microphones, DAQ hardware, and measurement software.
For more information, visit http://www.bswa-tech.com/web_proDetail.action?proId = 378
R-Cabin
R-Cabin is a small reverberation chamber which can be used to measure the sound absorption of materials for automotive industries.
R-Cabin features
Appropriate for measurement of sound absorption characteristics of small and irregular samples, such as car seat, roof panel, and carpet.
The size of the tested sample can be up to 3 m2.
Frequency range: 400–10,000 Hz.
Applications
Designing and optimization of the inner car decoration acoustic system.
Testing of the sound absorption coefficients of the inner car items.
Quality control of the tested items.
R&D of new materials and new items.
For more information, visit http://www.bswa-tech.com/web_proDetail.action?proId = 320
BSWA SW series accelerometers
BSWA SW series accelerometers are vibration sensor designed for the automotive, railway, and aerospace noise, vibration, and harshness (NVH) application with small size and light weight. It is suitable for multi-channel NVH, modal analysis, and OPTA testing.
SW series accelerometers are traditional accelerometer based on piezoelectric ceramics technology, using imported ceramic sensing element, titanium shell, and 1/4-28 4-Pin connector. Performance and appearance can be comparable with leading competitors’ products.
BSWA has a strict quality control system, and each accelerometer has to pass environmental experiments with military standard before it leaves the factory, which lead to meet the needs of defense field or routine testing. Accelerometer cable is the most easily damaged parts, and BSWA has enhanced the connectors and cables to improve the life of product.
For more information, visit http://www.bswa-tech.com/web_proDetail.action?proId = 435
Echo barrier
Why is it all too often we see construction sites with fencing but no regard for sound issues created from the construction that is taking place? This is due to the fact that there has not been an efficient means of treating this type of noise that is cost-effective until now.
Echo barrier temporary fencing is a reusable, outdoor sound barrier. It was designed to fit on all types of temporary fencing. This acoustic barrier fence absorbs sound while remaining quick to install, light to carry, and tough to last.
For more information, visit https://www.acousticalsurfaces.com/temporary-barrier/echo-barrier.html
Envirocoustic™ wood wool
Cementitious wood-fiber acoustic ceiling and wall panels.
Wood wool is now a leader in the eco-friendly, high-performance, cost-effective acoustical-panel products category. Envirocoustic™ performs well by absorbing sound while thermally insulating; ecologically, acoustic wool is simple to produce; and panels are available in many size and color variations that can be designed to fit nearly any décor.
These eco-friendly cementitious wood-fiber panels not only liven up a room with design variety, but acoustic wool panels also reduce echo and reverberation through sound absorption. Wood-fiber panels can transform the esthetics and acoustics of any interior space.
For more information, visit https://www.acousticalsurfaces.com/envirocoustic-woodwool
Silk metal™
Micro-perforated acoustical ceiling and wall panels.
Our unique Silk Metal Ceiling Tiles are state-of-the-art micro-perforated aluminum sound absorber panels that reduce echo and sound reflections. These metal ceiling panels have an elegantly smooth appearance, with an excellent noise reduction coefficient (NRC) rating of 0.80. Resembling smooth silk fabric, these affordable regular or flat tiles are installed easily into any standard 15/16″ ceiling grid.
For more information, visit https://www.acousticalsurfaces.com/silk-metal/silk-metal-ceiling-wall-panels.html
DNSB-A sway brace/wall tie
DNSB-A is a low-frequency wall tie. This sway brace has a bolt end for stud walls or hooked end for masonry walls. The DNSB range is our most popular acoustic wall tie. These sway braces are available in two different sizes and with various ends to suit different wall constructions. DNSB-A acoustic sway braces are supplied pre-compressed to ensure consistent acoustic isolation while tolerating a range of wall loads.
For more information, go to http://www.mason-uk.co.uk/dnsb-sway-bracewall-tie/
SWW masonry isolation
Mason’s SWW-type acoustic wall, isolation strips are designed to isolate a wall from the base slab. The SWW is designed to suit width and wall load.
These SWW wall support plates prevent the transmission of vibration between a wall and the base slab and are designed specifically for each project in order to provide the correct structural and acoustic properties. The SWW can be designed to accommodate a wide range of wall weights, and designs can be accommodated.
For more information, visit http://www.mason-uk.co.uk/sww-masonry-isolation/
DURACOUSTIC®—sound deadening underlay
The DURACOUSTIC un-derlayment system acts not only as a sound deadener but also as a decoupler by stopping the sound transmission path through the floor–ceiling assembly and averts noise flanking room to room.
DURACOUSTIC Sound Control Underlayment is a sophisticated but very effective answer to creating floor systems which meet stern sound ratings in multi-story residences, condominiums, hotels, apartments, private homes, and business applications.
Testing carried out by National Research Council of Canada has demonstrated outstanding sound attenuation with a variety of construction assemblies and floor coverings, including ceramic tile, parquet, and laminate and hardwood floors. DURACOUSTIC underlayment is a 8 mm (5/16″) reinforced rubber (recycled) matting with an open cell structure which enhances its sound deadening properties making possible the installation of cost-effective sound-rated floors.
DURACOUSTIC underlayment is a 5/16″ reinforced rubber (recycled) matting with an open cell structure which enhances its sound deadening properties making possible the installation of cost-effective sound-rated floors.
For more information, visit http://www.acoustiguard.com/products/soundproofing-floors/duracoustic.html
In-Line Silencer for duct noise reduction
The In-Line Silencer is an apathetic device that when installed assists with the attenuation of noise levels being transmitted through the duct system. The In-Line Silencer is a completely passive device that will not impede airflow when attached to the existing ductwork. It is made of metal and lined with acoustic mineral liner. The In-Line Silencer is easy to install and available in two diameters—5″ and 6″.
It is used as a barrier for loud, annoying sounds traveling throughout your ductwork from source such as noisy air handlers, fans, loud furnaces, and air-conditioning systems. It virtually eliminates the transmission of voices, music, and sound from home-theater systems from one room to the next.
For more information, visit http://www.acoustiguard.com/products/pipes-ducts/inline-silencer.html
Sound barrier walls, acoustic barriers, and sound fence panels
The Sound Barrier Wall System is an acoustically absorbent, high transmission loss noise barrier wall system. They are ideal for absorbing and blocking unwanted noise from commercial, industrial, residential, or traffic noise applications. Silent Protector Noise Walls are a maintenance-free alternative in the sound mitigation wall industry.
Noise Barriers (also known as Noise Walls, Acoustic Barriers, Noise Fences, or Sound Barrier Walls) have been made of a number of different materials over the years. Noise barriers are solid obstructions built between noise sources, be it highway noise or air conditioning equipment, which are designed to be “line of sight” interruptions between the noise source and the receiver. Noise Barriers are typically made from concrete, steel, vinyl, wood, or earth mounds called “berms.” Berms are pretty good, but in order to be effective sound barriers, they have to be so wide that they can take up huge amounts of valuable land. Steel barriers are expensive, subject to corrosion, and dent badly especially if they are going to have snow thrown up against them by snow plows. Concrete sound barriers are incredibly heavy, very expensive, and are subject to needing replacement in as little as 10–20 years. Properly engineered vinyl barrier like Silent Protector Noise Wall is the best choice for lower in place costs, great acoustic performance and appearance combined with a life span many times that of all other acoustic barrier noise wall systems.
For more information, visit http://www.acoustiguard.com/products/soundproofing-walls-ceilings/sound-barrier-walls.html