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CI/SfB (57) XyUniclass L7535November 2015
SOUNDSCOOPACOUSTIC TRANSFER VENTILATION PRODUCTS
2
SOUNDSCOOP VENTILATION
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Passivent SoundScoop is a range of airventilation units which combine exceptionalacoustic attenuation with very low airflowresistance.
This combined performance is superior toany existing comparable unit on the market.
The range comprises of the SoundScoop andSoundScoop iAT (intelligent AirflowTechnology).
The SoundScoop has been developed toattenuate the mid frequency band 500 - 2000Hz as speech and circulation noiseconstitute the main source in commercialand educational buildings.
The SoundScoop iAT incorporates a lowpower consumption 50W sweep fan whichextends the range of the ventilation systemduring conditions when a design strategymay reach its limits of performance.
Contents
SoundScoop Ventilation 2, 3, 4 & 5
SoundScoop iAT (intelligent Airflow Technology) Ventilation 6 &7
Further information 8
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Acoustic designSoundScoop uses a highly innovativeapproach to acoustic design which allows alarge unobstructed ventilation area. Theopen design is based on selective soundabsorption at key frequencies, and does notrely on baffles or diverters. SoundScoop hasbeen designed in association with Arup in acollaborative approach to acoustic design,natural ventilation performance and productdevelopment.
The acoustic performance of theSoundScoop has been developed through anengineered approach where the exact natureof the source noise and receiver sensitivityhas been considered. As such, each unit istargeted in terms of the sound it attenuates.This means it outperforms any otherequivalent product on the market in terms ofattenuation of speech and footfall.
noisy corridor/circulation space
separating construction
noise source planequiet space
receiver plane
SoundScoop positionedoutside plane of sourceand receiver
Typical applicationSoundScoop used as a cross-ventilation pathbetween two spaces
Acoustic performanceIndependently tested to BS EN 20140-10:1992and ISO 140-10:1991, and can be shown tocomply with Building Bulletin 93 and thePriority Schools Output Specification ForAcoustic Design.
SoundScoop and natural ventilationNatural ventilation is a key strategy inproviding a healthy environment inbuildings whilst avoiding excessive energyuse. Cross-ventilation or free air transferbetween internal spaces are importantaspects of ventilating the whole building. At the same time most buildings requireacoustic separation between noisy areas andnoise-sensitive areas.
SoundScoop has been specifically designedto meet these conflicting requirements witha large free ventilation area, low airflowresistance and high levels of noise reduction.
ApplicationsSoundScoop provides:
● Air transfer (crossflow ventilation)between internal spaces of buildings aspart of a natural ventilation system.
● Sound reduction between noisy areas andquiet areas, for example betweencirculation spaces and working, meetingor teaching spaces.
● Speech privacy, allowing normalundisturbed speech in adjacent areas.
Examples of use:
● Offices: between open plan offices andmeeting rooms, or between two meetingrooms.
● Education buildings: between circulationspaces and classrooms.
● Hotels: between bedrooms and corridors.
● Health buildings: between patient areasand circulation areas.
SoundScoop can be used to meet theacoustic and ventilation requirements of:
Building Regulations Part F Means ofVentilation, Part L Conservation of fuel andpower, and Part E Resistance to the passageof sound.
BB93 Acoustic design of schools - a designguide.
BS 8233: 1999 Sound insulation and noisereduction for buildings - code of practice.
Priority Schools Output Specification ForAcoustic Design.
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Example applications
Noisy space Noise-sensitive space SoundScoop type Effect
Open plan office Meeting room 300mm long version with Vent attenuation provides adequate privacy to the 320mm(W) x 320mm(H) body open plan space and appropriate control of noise
ingress to the meeting room
Atrium/primary Classroom 600mm long version of Vent attenuation provides adequate control of noise 620mm(W) x 320mm(H) body circulation ingress to the classroom
Meeting room Meeting room 900mm or 1200mm long version with Vent attenuation provides good standards of privacy 620mm(W) x 320mm(H) body so that even raised voices are not intelligible
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specially designed covergrilles maintain free areaand low air flow resistance
acoustic attenuationsleeved mineral wool
ribbed configuration provides highacoustic absorption
sleeve of 100%recycled ABS
large unobstructedventilation area allowshigh airflow rates
internal duct lining materialremoved for clarity
Patent pending
● Optimised acoustic design for thetransfer of air between noisy and noisesensitive spaces.
● Extremely low airflow resistance due toan entirely unimpeded acoustic path(coefficient of discharge Cd value oftypically 1.04).
● Provides up to a 90% increase in openarea compared to previous marketleading product.
● Cost competitive solution.
● Available in a range of sizes to suit theapplication.
● The configurations have beenindependently tested for acousticperformance.
● The SoundScoop can be demonstrated to meet the acousticrequirements of BB93.
● Lightweight design for transportationand ease of fitting with unit weightsranging from 3.0 to 18.3kg.
● Manufactured in the UK and availableready assembled for installation on site.
The SoundScoop has been developed toattenuate the mid frequency band 500 - 2000Hz as speech and circulationnoise constitute the main source incommercial and educational buildings.
SOUNDSCOOP VENTILATION
FEATURES & BENEFITS
Specicification clausesProvide ventilation by means of Passivent SoundScoop AcousticTransfer Unit supplied byPassivent Ltd, North Frith Oasts,Ashes Lane, Hadlow, Kent TN11 9QU. Telephone: 01732 850770.Fax: 01732 850949. Email: [email protected] width 320/620mm*,height 320mm, length300/600/900/1200mm*,ventilation area 0.04/0.1m2*. The sleeve is manufactured fromfire retardant ABS, which is linedwith mineral wool and coveredwith a membrane. Can be demonstrated to complywith BB93, PSOS and BS 8233.Tested to BS EN 13141-1: 2004Ventilation for buildings. Supplied with SoundScoop covergrilles.* SoundScoop to have beenappraised under BS EN ISO 9001. Installed by an approvedMasterCare installer.*
*Delete as applicable
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Flow performance
Free area (m2) Coefficient of discharge, Cd
W x H (mm) SoundScoop Cover grilles SoundScoop Cover grilles
320 x 320 0.04 0.05 1.04 0.75
620 x 320 0.10 0.10 1.04 0.75
Below are the eight SoundScoop combinations oftwo cross-sections and four lengths that areavailable. Units have been acoustically tested withdetailed results for frequency bands available onrequest.
620mm opening
320mm opening
Front viewCover grille removedfor clarity
Section600mm lengthshown
lengthceiling level
alternativeceiling level
Typical sections, 620mm(W) x 320mm(H) unit
Acoustic performance and weight
Unit dimensions Average mid-frequency Acoustic performance Unit weightWidth x height Length Dn,e (dB) Dn,e,w (dB) (kg)(mm) (mm) 500 - 2000Hz
300 34 32 3.0
600 45 39 5.9320 x 320
900 52 41 8.8
1200 56 44 11.7
300 30 29 4.6
600 39 36 9.2620 x 320
900 46 40 13.8
1200 52 42 18.3
(Figures shown for 900mm long unit)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
1.2
1
0.8
0.6
0.4
0.2
0
Air velocity (m/s)
Pre
ssur
e lo
ss (
Pa)
0.6
0.4
0.2
00 0.2 0.4 0.6 0.8 1.0
SoundScoop provides atypical low pressure loss of0.2Pa at a velocity of0.6m/s
SoundScoop pressure loss (excluding cover grilles)
PERFORMANCE
The performance of the SoundScoop hasbeen achieved through consideration ofthree design features, each of which arenecessary for it to work most effectively.These are summarised below.
1. By positioning the unit out of the planeof source and receiver, sound is forced totake an oblique path through the ventthereby removing the need for bends orsplitters. See illustration on page 3.
2. Optimised cross-sectional dimensionsare used to target attenuation over thedesired range of frequencies. TheSoundScoop is sized so that the ‘cut-on’frequencies, end reflection and amount ofattenuation is optimised for the target 500 - 2000Hz speech range.
3. The patented internal lining whichfeatures ribs at regular centres has beenshown to provide more than 10dB ofsound attenuation in a given octave band. This is achieved by:
- Firstly, there is resistive interferencewhere sound is reflected and partlyabsorbed at frequencies whosewavelengths relate to the period of theribs.
- Secondly, the discontinuities result in non-plane wave motion below the cut-onfrequency. In other words, low frequencysound that would travel unhindered in auniformly lined duct is disturbed by theribs and more readily attenuated.
- Thirdly, the ribs and strips of soundabsorbing material prevent wave motionalong the length of the unit, forcing localreaction between the sound and foamlining. This is known to maximise theattenuation in lined ducts.
Based upon 900mm long, 620mm wide x 320mm high unit
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● Low energy consumption 50W fan uses minimum energy when compared to full mechanical systems.
● SoundScoop targets speech and footfall frequencies, the main cause of disturbance via air transfer devices.
● Extends the performance envelope of a ventilation strategy by creatingpositive pressure during peak summer temperatures/conditions.
FEATURES & BENEFITS
The SoundScoop iAT (intelligent AirflowTechnology) has been designed to specificallyextend the performance envelope of anatural ventilation system.
Dimensions
Wall opening SoundScoop iAT Coefficient of discharge, Cdwidth x height length (mm) free area (m2) weight (kg)(mm)
1248 x 344 1589 0.20 74 0.491889 0.20 88 0.492189 0.20 102 0.49
Acoustic performance
Length (mm) Average mid-frequency Acoustic performanceDn,e (dB) Dn,e,w (dB)500 - 2000Hz
1589 >36 >331889 >43 >372189 >49 >39
Sound pressure level for fan measured at 3.0m without enclosure 32dB(A)
Utilising the proven SoundScoop toattenuate speech and footfall backgroundnoise, the SoundScoop iAT incorporates alow power consumption 50W sweep fanwhich extends the range of the ventilationsystem during conditions when a designstrategy may reach its limits of performance.
Case constructionMarine grade structural timber.
Acoustic performanceSee table below.
InstallationPositioned between the atrium and adjoiningrooms. Can be installed through a bulkheador plasterboard ceiling, or where there is asuspended ceiling using the adjustableceiling adaptor.
Recommended fixing: to soffit with bracketssupplied.
Specicification clausesProvide ventilation by means ofPassivent SoundScoop iATAcoustic Transfer Unit supplied byPassivent Ltd, North Frith Oasts,Ashes Lane, Hadlow, Kent TN11 9QU. Telephone: 01732 850770. Fax: 01732 850949. Email: [email protected] iAT width 1248mm,height 344mm, length1589/1889/2189mm*, ventilationarea 0.2m2 and cd value of 0.49.The SoundScoop sleeve ismanufactured from fire retardantABS, which is lined with mineralwool and covered with amembrane. SoundScoops are mounted into alarger enclosure that incorporateda low powered 50W boost fan.Supplied with SoundScoop covergrilles. Can be demonstrated tocomply with BB93, PSOS and BS 8233. Tested to BS EN 13141-1:2004Ventilation for buildings.SoundScoop iAT to have beenappraised under BS EN ISO 9001.Installed by an approvedMasterCare installer.*
*Delete as applicable
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Two operating modesThe SoundScoop iAT uses one of twooperating modes depending on the needs ofthe building.
Mode 1 NaturalMost of the year
In mid-season temperatures, external freshair enters the room through façade inletssuch as Passivent Aircool Ventilators. The airis mixed at high level and is drawn naturallyout through the SoundScoop iAT exhaustingthrough high level passive stack outlets suchas Passivent Airstract Terminals or atriadesigned into the building.
Mode 2 iAT (intelligent Airflow Technology)Peak summer temperatures or extreme events
During peak summer temperatures, theminimal temperature difference betweenindoors and outside can result in low flowrates for passive stack ventilation, especiallyon still windless days. During these periodsor at other times of unusual events, such ashigh occupancy or unusual heat gain, thebuilding will suffer from raised temperaturesor higher than normal CO2 levels leading toreduced air quality and lethargy for the room occupants. These changes in internalconditions are identified by the PassiventIntelligent Controller which activates the lowenergy fan. The fan generates a change ininternal pressure which maintains theventilation system performance until eitherthe temperature or CO2 levels have achievedthe targeted set point.
1
2
SOUNDSCOOP
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910084 November 2015 4686
Other productsPassivent market a range of other naturalventilation and daylighting productsincluding:
Aircool façade ventilators - systems forwindows, curtain walling and walls
Airstract and Airscoop roof ventilationterminals
Acoustic passive ventilation
iPSV and iMEV systems
Ventilation control systems
Combined rooflights/ventilators
Natural and assisted domestic ventilationsystems
Fresh wall ventilators
Tricklevent window ventilators
Solar shading
ServicesPassivent has its own in-house researchteam dedicated to developing techniques andproducts for natural ventilation, and is aleading partner in some of the mostimportant research projects in this fieldincluding NatVent™, a consortium ofEuropean organisations headed by BRE.
We offer a comprehensive design andadvisory service tailored to your specificproject, covering both natural ventilationdesign and product selection. Advancedsoftware based on CIBSE AM10 is used tocalculate sizes of air inlets and outlets toachieve optimum performance.
Names of approved installers can be providedon request.
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PASSIVENT LIMITEDNorth Frith Oasts, Ashes Lane, Hadlow, Kent TN11 9QU Tel: 01732 850770 Fax: 01732 850949
Email: [email protected] Web: www.passivent.com
Passivent Limited maintains a policy of continuous development and reserves theright to amend product specifications without notice.
A division of Building Product Design Ltd. Company Registration No; 3944123
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ISO 9001 OHSAS 18001
