Welcome to the acoustique calculation according vdi 2081. The program has been designed, developed and is supported by caices inhouse microsoft certified software development team. As a result you may choose from a selection of standard or custom engineered duct silencers that will satisfy the requirements of each application. Select high or standard performance attenuation as required. Trox gmbh confirms that the current trox easy product finder software epf and its updates can be downloaded and used free of cost. Intermediate values may be achieved by interpolation. This software automatically considers the new energy efficiency requirements for all xcube air handling units and hence ensures their correct configuration. The quick sizing tables are based on generally accepted attenuation levels. Performance data is based on australian sourced and manufactured products. The sound attenuators should have adequate silencing capabilities, low air. Rectangular splitter attenuators splitters trox yumpu. Sound attenuator selection software and acoustical duct system analysis kinetics noise control, inc. Noise and attenuation noise is usually defined as unwanted sound noise, noise generation, silencers and attenuation in hvac systems. Splitter sound attenuators of type msa contain splitters of type mka.
Select the crosstalk attenuator type that is required ie. Our kselect selection software incorporates powerful engineering tools to provide a design reference that can save significant time in the design of a buildings hvac system. For optimum sizing of sound attenuator, selection is made through computer aided design. Generally, the sound power level per diffuser is limited to 40 dba. Price industries who we are the founding principles of price have never changed business integrity, firstclass service, innovation and a commitment to people. Attenuation effect due to absorption and resonance. Installation of sound attenuator tx h 100 mm 1 vav terminal unit tvj tvt. The guide also allows selection of the necessary attenuators. Our sound attenuator silencer are carefully designed to combat noise problems.
Also referred to as duct silencers, sound traps or mufflers, they are designed to reduce the noise transmitted from a source to the receiver. Easy product finder selection programme trox south. Acoustic calculation of ventilation systems engineering toolbox. Fantechs rectangular and crosstalk ranges attenuators are available in a wide range of dimensions, circular attenuators, rectangular attenuators, sound bar attenuators, crosstalk attenuators and powerline ranges are suitable for neardirect connection to our fans. All values were measured in a trox lab and to en iso 7235. To comply with a specified noise level, sound attenuators are added to suitable locations in the ventilation. Additional tabs include the calculations per ahri 885, an nc table, and the dba calculator. H dimension, the sound attenuators are delivered with. Easy product finder selection programme trox australia pty ltd. As a result you may choose from a selection of standard or custom engineered duct silencers that.
To optimise acoustics and flow, the tx sound attenuator has an empty chamber. Trox provides technical data sheets or specific software. The relevant calculated requirements to be placed on the sound attenuator are used. Generally mounted within the systems ductwork, they ensure that a specific noise criteria is achieved within the internal or external areas they are installed in. Attenuator pressure loss a sound attenuator restricts the passage of air flow through it. Downloads product information print page lkl lkl technical leaflet 630 kb pdf. Trox air handling units of type xcube are configured to individual customer requirements with a dedicated configuration software. Click the above image in order to see a magnified image of the software.
Sound attenuators noise reduction for hvac duct systems. Sound attenuators permit the passage of air while reducing noise in ventilation systems. Easy product finder selection programme trox auranor norge as. We do this by offering you, at no cost, using our silencer database, selection and duct analysis program. Sound power and sound pressure are different in that sound power is a. Sound attenuators for hvac systems kinetics offers the design and engineering assistance to integrate our line of duct silencers, sound attenuators into a system solution. Ncs acoustics design, manufacture and install many types of attenuators, including. Easy product finder selection programme trox middle east.
The sound attenuators should have adequate silencing capabilities, low air resistance and be as small as possible. Design lkk is a rectangular steel unit featuring internal vertical splitters with mineral wool with a glass fibre layer inside. Lab measurements exceeding 50 db are indicated as 50 db, in line with common practice. Attenuators are part of the fantechs tested range of attenuators. For applications such as prison cells where it is necessary to have a heavy and robust construction and a high level of tamper resistance. The restriction of the attenuator is defined in pa of static pressure loss. Hvac systems heating, ventilation and air conditioning systems. We are one of the largest manufacturers of attenuators in the uk, currently supplying about 60,000 units annually.
Silencer lengths will be chosen to suit your acoustic, space andor pressure loss requirements automatically selected by asi aeroacoustic proprietary computer program. Detailed attenuator insertion loss sil spectrums based on testing to the bs47181971 standard can be obtained using the fans by fantech product selection program. The pressure loss of the attenuators in this catalogue is charted in two different ways. As suitable and reliable selection aids, trox will. Attenuators and loose splitters of all types are made to order at our manufacturing facility, with no limitations on size and material. Trox uk ltd ventilation diffusers, ventilation grilles, chilled beams.
This type of grille construction and installation detail is designed to meet latest home office requirements. The location of a sound attenuator can also greatly impact both attenuation and pressure loss. Vfl, sound pressure level at differential pressure 50 pa. The control components attachments include a differential pressure transducer that transforms the differential pressure effective pressure into an electric signal, a controller, and an actuator. Easy product finder selection programme trox india. Labcontrol is a modular system that can be tailored to whatever customers need. Sound attenuator selection software and acoustical duct. Our noisereducing attenuators are developed for fan units and other equipment within heating, ventilating and air conditioning, also known as hvac systems. The exhaust single duct terminal is commonly used in spaces that require either exhaust air volume control, or space pressurization control.
Labs and clean rooms pose the greatest challenge to air management systems. Splitter sound attenuators used for the reduction of fan noise and airregenerated noise in air conditioning systems. We also undertake sound attenuators manufacturing for projects that require large nonstandard sizes for large air volumes. Our department for servicerequests will contact you asap. Windows 7 windows 8 windows 10 windows xp is not supported anymore. An acoustic noise calculation of a ventilation system can follow the procedure indicated in the example below. Trox has a wide selection of dampers, louvres and doors to complement the. Sound attenuator selection software and acoustical duct system analysis register.
For selection and dimensioning of chilled beams use the program auracool. Your message is send and will be processed shortly. The inlet attenuator is used to help lower the sound generation by the valve when it is operating in a less than full open position. Rt series rectangular attenuators the rt series is ideal for general hvac purposes and suitable for industrial applications. Operating system support the following operating systems are supported. For general question regarding products or services you can also call. How to select a rectangular attenuator for this scenario, noise from a car park exhaust fan results in a noise level of 83dba in the car park it ventilates. Here programs for dimensioning of our attenuator products can be downloaded. Trox services productsearch az find out quickly and simply.
Easy product finder selection programme the new trox easy product finder fast. Design software for selecting proper and economical. Sound attenuators which consist of a casing with duct connections and splitters. Commercial acoustics sound attenuators are manufactured in many varieties, module sizes and materials, including nofill models and models that eliminate acoustical fill entrainment into the air stream. Sound attenuators are a proven and effective method for reducing the noise generated by fans and other equipment. For this purpose, trox provides technical data sheets or specific software. Lkl is a rectangular sound attenuator for installation in rectangular ducting. Lkrv is a square sound attenuator with a circular end and side spigot in order to accommodate a rightangled bend. The rectangular attenuators are available in the following models.
The first selection criteria for the nominal size are the actual volume flow rates v min and v max. Lkr and lkrv comprise a square steel unit where all 4 internal walls are lined with mineral wool with a glass fibre layer. Rectangular attenuators and splitters trox asia pacific. The sound wave generated by these sources transfer its energy throughout the duct and to the occupants area as shown below. Acoustics room acoustics and acoustic properties decibel a, b and c noise rating nr curves, sound transmission, sound pressure, sound intensity and sound attenuation. Noise generation and noise reduction in air conditioning systems with this program you can calculate generated noise and attenuation for components of a airconditioning system according vdi 2081, july 2001.
The vav terminal unit is fitted with a differential pressure sensor for measuring the volume flow rate. Design lkr and lkrv comprise a square steel unit where all 4 internal walls are lined with mineral wool with a glass fibre layer. Our product catalog and kselect provides octave band sound power data for all air outlets. One common mistake is to locate a sound attenuator too close to a fan. H 1800 mm and l 2100 mm the modular sections of the attenuators will be supplied as loose items to site to be installed by others. These attenuators deliver good acoustic attenuation properties across a broad spectrum of sound frequencies while maintaining low air flow pressure. Easy product finder selection programme trox middle east llc. Improving your environment osal osacp sound attenuators. The pressure loss of the attenuators in this catalogue is charted in. Full details of the attenuator configuration ill b epr ovided y trox th cus mer n the order is confirm d.
A graphical representation of the input and output sound values is provided. To comply with a specified noise level, sound attenuators are added to suitable locations in the ventilation system. In ventilation systems, noise stems from a variety of components such as the fans or the fire dampers. Lkk is a rectangular sound attenuator for installation in rectangular ducting. Sound attenuators should generally be located as close to the noise source as possible, but far enough away to have a uniform, laminar profile of air flow. Trox gmbh retains all rights to work on and modify the software. Generally, the sound power level per diffuser is limited to 40 dba without room attenuation. Trox delivery times get information on the trox delivery times quickly and simply. Splitters and splitter attenuators from trox are certified for use in room air conditioning systems in accordance with vdi 6022 parts 1 and 3, din 1946 parts 2 and 4 and vdi 3802. Trox australia pty ltd level 32 101 miller street north sydney 2060 new south wales, australia. Generally mounted within the systems ductwork, they ensure that a specific noise criteria is achieved within the internal or. If the sound pressure level exceeds the required level, a larger air terminal unit andor a silencer is required. Our dependable quality, reliable delivery, and knowledgeable followup service have made price a market leader in supplying air distribution, critical controls, and noise control. Galvanized steel outer casing of the silencer is designed to hvac standard, perforated baffles is filled with an odourless, incombustible, vermin proof and moisture proof inorganic sound absorbing material.
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