troldtekt_speakers_january 2013_uk.pdf

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TroldtektspeakersIntegrated sound

PRODUCT INFORMATIONTROLDTEKT SPEAKERS


2/82 > TROLDTEKT SPEAKERS

Troldtekt speakers are integrated andconcealed in the Troldtekt ceiling.No visible cabinet speakers or wires,rather architectural purity and clear lines.Troldtekt speakers are based on moderntechnology ensuring top-quality soundreproduction. At the same time, the

Troldtekt panels provide optimum acous-tics in the room, distributing the soundclearly and comprehensibly without anydisturbing reverberation.

This is an elegant and discreet soundexperience for office environments,cafs and theatres, railway stationsand airports and, of course, for yourliving room.

Read more about Troldtekt speakers onthe following pages and take inspirationfrom the two case studies the officebuilding Harbour House designed by KimUtzon and the Gammel Rye parish com-munity centre designed by CUBO.

Enjoy!

Troldtekt

speakers integrated sound

Troldtekt speakers .............................................................2

Technology background ................................................3 Good sound coverage

Dimensions ..........................................................................4-5 Speakers

Subwoofers

Case studies .........................................................................6-7 Harbour House

Gammel Rye parish community centre

Service ............................................................................................8

About us .......................................................................................8

Published by: Troldtekt A/S 2013

Photos: Thomas Mlvig and Martin Trsleff

Design: www.ineo.dk

Text: www.publico.dk, www.pressential.co.uk


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Technology background

GOOD SOUND COVERAGE

Troldtekt speakers are integrated in Troldtekt acousticpanels, so you wont notice the speakers in the ceiling but you will hear them.

A Troldtekt speaker is a Troldtekt acoustic panel with

a specially developed NXT panel integrated and con-

cealed in the actual Troldtekt panel. An NXT panel

is a complete flat speaker unit which transforms

electrical impulses into vibrations which are in turn

transformed into sound waves. The sound waves

pass through the Troldtekt panel and are distributed

throughout the room.

It is important for good sound experience that the

sound reaches every corner of the room. In traditional

speaker systems, the sound is emitted from a few

points, often resulting in the experience that the sound

pressure is high and close to the speakers but then

quickly subsides to become weak in the most remote

corners. In other words, the sound is unevenly distri-

buted throughout the room. For example, this situation

is familiar in airport terminals and railway stations,

where you need to be close to the speakers to be able

to understand any messages.

In a Troldtekt acoustic ceiling with integrated speakers,

the speaker panels are evenly distributed over the en-

tire ceiling surface, which ensures sound signals of

uniform volume throughout the room. Traditional cabi-

net speakers often offer directional characteristics of

approximately 75 degrees whereas the speaker panels

in a Troldtekt acoustic ceiling have directional charac-

teristics exceeding 170 degrees. This ensures that the

sound signal from the acoustic panels is evenly distrib-

uted across the entire ceiling surface and always within

hearing range. This also means that the sound pressure

may be generally lower than in traditional systems

where it may be necessary to turn the volume up espe-cially loud to make sure that the signals reach every

corner.

75 75 170 170

To ensure optimum sound reproduction in thebass spectrum, we have developed a specialsubwoofer. The low subwoofer height of only13 cm (+ 5 cm for connection cables) enablesplacing of the subwoofer above the ceilingpanel or e.g. under a sofa.

Troldtekt speakers can be connectedto regular amplifier equipment withradio, CD, iPod or mixer/microphonesystems.

On the back of the NXT panel is aflat cassette which protects itagainst dust, impacts, gnawingmice and other threats.

> >

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DimensionsTo achieve an optimum sound experience in a room, it is importantfor speaker units and subwoofers, if any, to be dimensioned correctlyin relation to the room in question.

DIMENSIONING SPEAKERS

Several factors affect the sound experience in a room

and must be taken into consideration when calculating

the quantity and distribution of speaker panels in the

ceiling, to ensure as uniform a sound pressure as possi-

ble. Troldtekt will be happy to provide advice on dimen-

sioning of speaker units and to carry out measure-

ments for project planners.

Some of the factors affecting dimensioning are:

Speech intelligibility and sound pressure distribution

Room geometry, particularly the ceiling height

Room reverberation time

Background noise

Speech intelligibility and sound pressure

distribution

A high level of speech intelligibility requires a good

sound system and good room acoustics with a low

reverberation time.A Troldtekt acoustic ceiling ensures optimum sound

absorption with a low reverberation time in the room.

Furthermore, the NXT technology ensures that speech

emitted from the speaker panels is perceived clearly

and distinctly.

Geometry

At ceiling heights from 2.5 - 8 m, it would be sufficient

to have one speaker panel approximately every 30 sq

m to ensure optimum speech intelligibility and good

sound pressure distribution. At ceiling heights below

2.5 m, it may be necessary to increase the number of

speaker panels to ensure good sound pressure distri-

bution, while at ceiling heights above 8 m, it may be

necessary to increase the number of speaker panels. In

situations with smaller requirements for sound pres-

sure distribution or speech intelligibility, the number of

speaker panels can be reduced.

Reverberation time

The longer the reverberation time in the room, the

fewer speaker panels are required to ensure a suffi-

cient sound pressure. However, a longer reverberation

time will reduce the speech intelligibility so you should

therefore strive to reduce the reverberation time below

0.6-0.9 seconds, depending on the nature of the job.

The Troldtekt ceiling has high sound absorption and

efficiently reduces the reverberation time in the room.

Background noiseFor PA systems in particular, it is important that the

sound system signal is clearly differentiated from the

background noise. One way of obtaining this is to

ensure a sufficiently high sound pressure to drown out

background noise. Alternatively, you can ensure that

the sound is evenly distributed throughout the room

so that disturbing background noise does not act as a

barrier between the sound source and the listener.

Speakers as decoration

Troldtekt speakers can also be combinedwith Troldtekt decoration and are thendelivered as framed wall panels.

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DIMENSIONING SUBWOOFERS

Subwoofers ensure optimum reproduction of the lowbass frequencies below 200 Hz. For systems designed

to play music, it is important for achieving good sound

that the quantity of subwoofers is correct. Normally,

one subwoofer should be provided every 60-120 sq m.

As directional determination of the low bass frequen-

cies is difficult, the requirements for even distribution

of the speaker panels does not apply to subwoofers.

For PA systems, which do not require the same bass

volume as music systems, the number of subwoofers

can be reduced or possibly be eliminated

entirely.

In our library at www.troldtekt.com, you can find installation

instructions for Troldtekt speakers, and also installation

instructions for the various types of Troldtekt ceilings.

At ceiling heights from 2.5-8 m, itwould be sufficient with one speakerpanel approximately every 30 sq m toensure optimum speech intelligibilityand good sound pressure distribution.

Sound pressure is the generally usedmethod for measuring the power of

sound volume. The range perceivableby the human ear from weak topowerful sound pressure is enor-mous, which is why the decibel scale(dB) is typicall y used. 0 dB is theweakest sound perceivable by theear, while the most powerful soundsregister around 120-130 dB.

Sound pressure

and dB

The reverberation time is an expres-sion indicating how fast sound diesaway in a room, e.g. clapping yourhands. Specifically, it is the time

(in seconds) that passes from the endof the sound impulse until the soundlevel has dropped by 60 dB.

Reverberation

time

Speech intelligibility indicates howwell speech is perceived in a room either directly in the room with aspeaker and a number of listeners,or via a sound system with a micro-phone, amplifier and speakers.In its classic form, speech intelligibili-ty is measured by counting how manywords are correctly perceived froma text read by an articulate speaker.If the listeners perceive 60% of thewords correctly on average, thespeech intelligibility is 60% or 0.6.

Speech

intelligibility



The U-shaped Harbour House

opens its arms towards the

water. The 8,600 sq m struc-

ture is one of the long list of

buildings designed by architect

MAA Kim Utzon. Many of these

are located on Copenhagens waterfront but Utzons

touch is also strongly evident in Helsingborg, Swedenand Aalborg, Denmark. Harbour House is the joint

headquarters of three shipping companies and the

house activities are therefore highly port-related.

With so many offices and such intense meeting activity,

the acoustic environment plays a significant role in the

building, which is why Troldtekt has been used to

dampen sound in most rooms.

A series of new features

To ensure good sound and distribution allowing every-

one to hear the speaker, the conference rooms are

fitted with concealed Troldtekt speakers.We used several new features in Harbour House,

For one thing, we used integrated, concealed speakers

in the Troldtekt ceilings, which fit in nicely with the

Harbour HouseOpen arms at the port

One of the major construction challenges today is to make good acoustics,architecture and aesthetics come together in synergy. Troldtekt acousticpanels with integrated, concealed speakers ensure good acoustics and goodsound reproduction while presenting the ceiling as a clean, unbroken surface.In our inspirational section at www.troldtekt.com/inspiration, you can finda number of exciting case studies and pictures here are a few examples:

buildings overall expression. The sound is just there

and there is no visible equipment to disrupt the simple

look of the ceilings, says Kim Utzon.

The architects own offices are also on the water-

front, at Nordre Toldbod, where he has created an

inspiring base for his staff of 14.

Troldtekt in the signatureKim Utzons buildings are characterised by a clear choice

of simple materials that harmonise perfectly with the

overall architectural design. The supporting structures

are often visible concrete elements columns, beams

and T-panels combining to create a flexible and

extendable building system that has proved suitable

in many situations. Kim Utzon has also chosen to use

cement-bonded wood wool in many of his buildings,

making Troldtekt an important element in his architec-

tural signature.

Harbour House is the fifth element in the series

that Kim Utzon has dubbed Nolli. This structure formsan urban whole inspired by Giambattista Nolli, who

charted Rome around 1750.

Prime location and architecture characterises Harbour House, headquartersfor three shipping companies. The building forms part of the Nolli series,designed by Kim Utzon.

Client: Harbour House A/S

Architect:Kim Utzon Architects

Engineer:Wessberg A/S



Saint Sorens parish com-

munity centre is located

next to Gammel Rye church

a beautiful and elevated

location in the Central Jut-

land Lake District. Whereasthe church itself dates back

to the 15th century and the

brick tower was erected in 1912, the parish community

centre is newly built. The house was designed by the

architectural firm rstiderne Arkitekter A/S with great

reverence for the history of this location but also with

a present-day twist to show that we are now in the

21st century.

Multi-purpose room

The most important room in the parish community

centre is the confirmation candidate schoolroom whichfits well in the entire structure with its large corner

window facing the church. The room is used for teach-

ing, lectures, choir singing and other activities.

Naturally, this places considerable demands on the

acoustics in the high-ceilinged room. We therefore

chose Troldtekt, because in our experience this is the

Gammel Rye parish community centreMulti-purpose room with sound in every corner

The new parish community centre in Gammel Rye, Central Jutland, is rooted in historyand the Troldtekt ceilings fit in well with the buildings rustic character. Acoustic ceilingswith integrated, concealed speakers ensure good acoustics and good sound reproductionin the confirmation candidate schoolroom, which also serves many other purposes.

best acoustic panel and the sound properties of

Troldtekt are well suited for a multi-purpose room

such as this, says architect MAA Anders Krsgaard

from the rstiderne Arkitekter architectural firm.

Rustic expression with concealed soundTo provide the best possible sound experience in the

large room, four speakers are integrated in the ceiling

panels. This conceals the speakers and the sound pass-

es through the Troldtekt panels on its way into the

room. This allows the sound to be distributed to every

corner of the room without the speakers being visually

dominant.

The lobby and administration office also have

Troldtekt ceilings and a solution with integrated lighting

in the panels has been selected for this area.

Troldtekt is a rustic material and is therefore a

perfect match for the white-washed walls, the laminat-ed wood beams and the wide floorboards. The church

council was not easily persuaded because cement-

bonded wood wool has a history of use for ceilings

in livestock buildings. However, now that the building

is finished, the logic is clear to them and they are very

satisfied with the project, adds Anders Krsgaard.

Client: Gammel Rye church council

Architect: rstiderne Arkitekter A/S

Engineer: Sren Jensen A/S


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www.troldtekt.com provides a clear overview of the

many Troldtekt acoustic solutions. Using our product

generator, you can also download accompanyingAutoCad drawings, a description of the product range

and detailed installation instructions for the chosen

solution. The website also contains lots of inspiration,

among other things a number of reference pictures,

case studies and articles about trends.

Service

About us

International distributors

Technical advice

We are happy to provide technical advice for construction

professionals. We provide advice on Troldtekt acousticsolutions and associatedproducts, including the dimen-

sioning of Troldtekt ventilation and Troldtekt loudspeakers

and we also carry outlight and sound calculations for

project planners.

Troldtekt A/S has produced Troldtekt acoustic ceilingand wall panels since 1935 at Troldhede in central

Denmark. During this time, the product has undergone

continuous development and refinement.

Details of our international distributors are available on

www.troldtekt.com. They either stock our Troldtekt

products or can obtain them for you. Please contact

The result is a range of products which are testedto meet todays ever increasing demands for good

acoustics in a wide variety of buildings.

Troldtekt A/S

Sletvej 2A

DK - 8310 Tranbjerg J

DenmarkTel: + 45 8747 8100

Fax: + 45 8747 8111

Email: [email protected]

www.troldtekt.com

our distributors for general information, brochures

or data sheets. You are, of course, also welcome to

contact Export sales at our Head Office in Denmark.

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