PRODUCT INFORMATION TROLDTEKT SPEAKERS Troldtekt Integrated sound speakers
Troldtekt speakers integrated sound Troldtekt speakers are integrated and concealed in the Troldtekt ceiling. No visible cabinet speakers or wires, rather architectural purity and clear lines. Troldtekt speakers are based on modern technology ensuring top-quality sound reproduction. At the same time, the Troldtekt panels provide optimum acoustics in the room, distributing the sound clearly and comprehensibly without any disturbing reverberation. 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 This is an elegant and discreet sound experience for office environments, cafés and theatres, railway stations and airports and, of course, for your living room. Read more about Troldtekt speakers on the following pages and take inspiration from the two case studies the office building Harbour House designed by Kim Utzon and the Gammel Rye parish community centre designed by CUBO. Enjoy! Service...8 About us...8 Published by: Troldtekt A/S 2013 Photos: Thomas Mølvig and Martin Tørsleff Design: www.ineo.dk Text: www.publico.dk, www.pressential.co.uk 2 > TROLDTEKT SPEAKERS
Technology background Troldtekt speakers are integrated in Troldtekt acoustic panels, so you won t 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 concealed 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. > Troldtekt speakers can be connected to regular amplifier equipment with radio, CD, ipod or mixer/microphone systems. On the back of the NXT panel is a flat cassette which protects it against dust, impacts, gnawing mice and other threats. > To ensure optimum sound reproduction in the > bass spectrum, we have developed a special subwoofer. The low subwoofer height of only 13 cm (+ 5 cm for connection cables) enables placing of the subwoofer above the ceiling panel or e.g. under a sofa. GOOD SOUND COVERAGE 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 distributed 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 entire ceiling surface, which ensures sound signals of uniform volume throughout the room. Traditional cabinet speakers often offer directional characteristics of approximately 75 degrees whereas the speaker panels in a Troldtekt acoustic ceiling have directional characteristics exceeding 170 degrees. This ensures that the sound signal from the acoustic panels is evenly distributed 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 especially loud to make sure that the signals reach every corner. 75 75 170 170 TROLDTEKT SPEAKERS > 3
Dimensions To achieve an optimum sound experience in a room, it is important for speaker units and subwoofers, if any, to be dimensioned correctly in 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 possible. Troldtekt will be happy to provide advice on dimensioning of speaker units and to carry out measurements for project planners. 2.5 m, it may be necessary to increase the number of speaker panels to ensure good sound pressure distribution, 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 pressure distribution or speech intelligibility, the number of speaker panels can be reduced. 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 Reverberation time The longer the reverberation time in the room, the fewer speaker panels are required to ensure a sufficient 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 noise For 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 combined with Troldtekt decoration and are then delivered as framed wall panels. 4 > TROLDTEKT SPEAKERS
At ceiling heights from 2.5-8 m, it would be sufficient with one speaker panel approximately every 30 sq m to ensure optimum speech intelligibility and good sound pressure distribution. DIMENSIONING SUBWOOFERS Subwoofers ensure optimum reproduction of the low bass 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 frequencies 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. Sound pressure and db Reverberation time Sound pressure is the generally used method for measuring the power of sound volume. The range perceivable by the human ear from weak to power ful sound pressure is enormous, which is why the decibel scale (db) is typically used. 0 db is the weakest sound perceivable by the ear, while the most powerful sounds register around 120-130 db. The reverberation time is an expression indicating how fast sound dies away in a room, e.g. clapping your hands. Specifically, it is the time (in seconds) that passes from the end of the sound impulse until the sound level has dropped by 60 db. 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. Speech intelligibility Speech intelligibility indicates how well speech is perceived in a room either directly in the room with a speaker and a number of listeners, or via a sound system with a microphone, amplifier and speakers. In its classic form, speech intelligibility is measured by counting how many words are correctly perceived from a text read by an articulate speaker. If the listeners perceive 60% of the words correctly on average, the speech intelligibility is 60% or 0.6. TROLDTEKT SPEAKERS > 5
One of the major construction challenges today is to make good acoustics, architecture and aesthetics come together in synergy. Troldtekt acoustic panels with inte grated, concealed speakers ensure good acoustics and good sound reproduction while presenting the ceiling as a clean, unbroken surface. In our inspirational section at www.troldtekt.com/inspiration, you can find a number of exciting case studies and pictures here are a few examples: Client: Harbour House A/S Architect: Kim Utzon Architects Engineer: Wessberg A/S Harbour House Open arms at the port Prime location and architecture characterises Harbour House, headquarters for three shipping companies. The building forms part of the Nolli series, designed by Kim Utzon. The U-shaped Harbour House opens its arms towards the water. The 8,600 sq m structure is one of the long list of buildings designed by architect MAA Kim Utzon. Many of these are located on Copenhagen s waterfront but Utzon s touch is also strongly evident in Helsingborg, Sweden and 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 everyone 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 building s 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 architect s own offices are also on the waterfront, at Nordre Toldbod, where he has created an inspiring base for his staff of 14. Troldtekt in the signature Kim Utzon s 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 architectural signature. Harbour House is the fifth element in the series that Kim Utzon has dubbed Nolli. This structure forms an urban whole inspired by Giambattista Nolli, who charted Rome around 1750. 6 > TROLDTEKT SPEAKERS
Gammel Rye parish community centre Multi-purpose room with sound in every corner The new parish community centre in Gammel Rye, Central Jutland, is rooted in history and the Troldtekt ceilings fit in well with the building s rustic character. Acoustic ceilings with integrated, concealed speakers ensure good acoustics and good sound reproduction in the confirmation candidate schoolroom, which also serves many other purposes. Saint Soren s parish com- best acoustic panel and the sound properties of munity centre is located Troldtekt are well suited for a multi-purpose room next to Gammel Rye church such as this, says architect MAA Anders Kærsgaard a beautiful and elevated from the Årstiderne Arkitekter architectural firm. location in the Central Jutland Lake District. Whereas Rustic expression with concealed sound the church itself dates back To provide the best possible sound experience in the to the 15th century and the large room, four speakers are integrated in the ceiling brick tower was erected in 1912, the parish community panels. This conceals the speakers and the sound pass- centre is newly built. The house was designed by the es through the Troldtekt panels on its way into the architectural firm Årstiderne Arkitekter A/S with great room. This allows the sound to be distributed to every reverence for the history of this location but also with corner of the room without the speakers being visually a present-day twist to show that we are now in the dominant. 21st century. The lobby and administration office also have Troldtekt ceilings and a solution with integrated lighting Multi-purpose room The most important room in the parish community in the panels has been selected for this area. Troldtekt is a rustic material and is therefore a centre is the confirmation candidate schoolroom which perfect match for the white-washed walls, the laminat- fits well in the entire structure with its large corner ed wood beams and the wide floorboards. The church window facing the church. The room is used for teach- council was not easily persuaded because cement- ing, lectures, choir singing and other activities. bonded wood wool has a history of use for ceilings Naturally, this places considerable demands on the in livestock buildings. However, now that the building acoustics in the high-ceilinged room. We therefore is finished, the logic is clear to them and they are very chose Troldtekt, because in our experience this is the satisfied with the project, adds Anders Kærsgaard. Client: Gammel Rye church council Architect: Årstiderne Arkitekter A/S Engineer: Søren Jensen A/S TROLDTEKT SPEAKERS > 7
Service www.troldtekt.com provides a clear overview of the many Troldtekt acoustic solutions. Using our product generator, you can also download accompanying AutoCad 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. Technical advice We are happy to provide technical advice for construction professionals. We provide advice on Troldtekt acoustic solutions and associated products, including the dimensioning of Troldtekt ventilation and Troldtekt loudspeakers and we also carry out light and sound calculations for project planners. About us Troldtekt A/S has produced Troldtekt acoustic ceiling and wall panels since 1935 at Troldhede in central Denmark. During this time, the product has undergone continuous development and refinement. The result is a range of products which are tested to meet today s ever increasing demands for good acoustics in a wide variety of buildings. International distributors 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 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. Troldtekt A/S Sletvej 2A DK - 8310 Tranbjerg J Denmark Tel: + 45 8747 8100 Fax: + 45 8747 8111 Email: info@troldtekt.dk www.troldtekt.com