En54 speakers comparison
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The second generation ABF features an upgraded horn with higher SPL capability and enhanced water ingress protection. A single ABF is capable of covering large distances within a tunnel environment. For tunnels with a very small vehicle envelope, an ultra low profile version of the ABF is available.
The key advantages of the ABF approach include: Designed for tunnels — The ABF has not only been designed to deliver clear and intelligible messages but also to meet the intense demands of the tunnel environment. The primary purpose of any loudspeaker is to move air and create sound.
Extreme care has been taken to ensure that the unit can cope with the rigors of tunnel cleaning and sprinkler and deluge systems without compromising the performance of the loudspeaker. The exit or mouth of the flare is fitted with a stainless steel grill to prevent water from entering the flare during tunnel cleaning. This grill has been specially designed so that it does not affect the acoustical performance of the ABF Easy to install and maintain — With ABF, there are fewer installation points compared to conventional loudspeaker systems.
To assist with installation, an optional drilling template is available. Highly reliable systems — The cost of servicing equipment in tunnels is very high. For this reason Harman Professionaluses high quality components and a thorough quality assurance system to ensure that the ABF is reliable throughout its lifetime. This loudspeaker is EN Certificated for life safety applications. The patented Asymmetric Boundary Flare ABF geometry is based on the principle of using acoustical mirroring to obtain a flat coherent wave front.
The ABF is designed to be mounted on the ceilings of road tunnels, the ceiling then acts as a waveguide; reducing lateral reflections and obtaining a coherent wave front. The image above is a cross-section view comparing the direct sound frequency response of an ABF to a Symmetric horn. As you can see the Symmetric horn suffers significantly from interference caused by the ceiling reflection. It can be clearly seen that the ABF does not suffer from this problem.
This principle means that an ABF horn can provide a high power and high directivity whilst at the same time offering a wide frequency response and exceptional sensitivity. Generic horns and even symmetrical horns generally have poor directivity they do not control the dispersion of the sound well and throw sound out in all directions and suffer from a poor front to back ratio. Due to the patented ABF technology combined with the large size of the ABF horn we are able to provide a higher front to back ratio and greater directivity than other horn technologies.
This benefits the ABF in two ways: 1 Energy from additional horns combines with minimum interference creating a coherent wave front that travels along the tunnel 2 Weak rear radiated energy causes minimum interference.
This can be seen in the diagram as well as in the simulation video below. Therefore they have to comply with strict standards and regulations. Most of these standards demand that the system is capable of achieving 0. However, tunnels are very challenging spaces and 0. This 0. This must be predicted and measured with level dependant masking and with the specified background noise level. Background noise levels should be specified in octaves and include traffic noise as well as fan noise.
The system performance should be verified by an independent acoustic consultant. These BNL may vary considerably from tunnel to tunnel.
When we compare a symmetric horn which is one of the better standard solutions that is available with an ABF you can clearly see that there is a huge difference in performance when you model the system performance at dBA with the background noise level present.
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Please contact us directly for these files. ABF Tunnel Horn. More Details. What makes the ABF unique? Ceiling Reflections The image above is a cross-section view comparing the direct sound frequency response of an ABF to a Symmetric horn.
Directivity Generic horns and even symmetrical horns generally have poor directivity they do not control the dispersion of the sound well and throw sound out in all directions and suffer from a poor front to back ratio.
Superior Speech Intelligibility Minimum number of sources due to long throw High Directivity High Power Low Distortion Large front-to-back ratio Superior sound quality when compared to conventional folded horns, the ABF has a useful frequency response up to 12 kHz Reduced installation and maintenance costs compared to conventional folded horns EN Certificated for life safety applications.
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Honeywell 4" 100V 6W Metal Cabinet Loudspeaker, En54 Approved
The optimum choice for high powered vocal applications, music playback and demanding musicians. ART 3 is a brand-new classic: a re-engineered loudspeaker that preserves the original concept, which dates back to , with cutting edge technology. Power and high quality in a convenient package. The RCF D-Line speaker range boosts the performance of compact systems with a series of high-end solutions.
Public Address and Voice Alarm
The EN 54 Fire detection and fire alarm systems is a series of European standards that includes product standards and application guidelines for fire detection and fire alarm systems as well as voice alarm systems. The product standards define product characteristics, test methods and performance criteria against which the effectiveness and reliability of every component of fire detection and fire alarm system can be assessed and declared. Annex ZA of the harmonised standards specifies which sections of the standard apply for the purposes of the CPR. Annex ZA also describes the two-stage certification:. This standard series is partly used around the world in several countries outside of European Union , for example in Latin American countries, Brasil, African and Asian countries and several islands in the Pacific Ocean. The standardization topics relating to fire protection were among the first dealt with by CEN. This is obvious since CEN numbers the European standards in numerical ascending order according to the date of project registration. The standard on fire classes is numbered EN 2 [1] and the series of standards on portable fire extinguishers is numbered EN 3. EN and EN were issued in
Bosch EN54-24 Speakers
Stand alone or as a part of the CLA The Archon is a 6. It has a rated power of Wrms and is also weatherproof. Ventis is part of the Ventis range which are ideal for portable performance or fixed installation. This Passive speaker Features an 8" woofer and a 1" exit 1.
Planning example: supermarket
It feature spring clamp mechanism for easy mounting to the ceiling. The input impedance can be easily changed by changing the tap position of the transformer. The push-in type input terminal block makes cable connection easy and allow bridge wiring. The PCBS is suitable for announcement and music use in high quality sound cone speaker. Speaker design that harmonize with venue's architecture and decor. This speaker equipped Fire Dome to protect and prevents the fire from spreading in the ceiling in case of an emergency situation.
Live Sound
Did you know we specialize in Fire Alarm and Evacuation Speakers? Since , our speakers have been used in over 3 Million Installations. Have questions? Let us help. We are your source for audio solutions. Email: contact Stetron. Customer Service: Canada: U.
NWB-3 / NWB-5 / NWB-8
A selection of affordable, dual cone ceiling mounted speakers from JBL. This range of speakers are suited for background music in cafes, high street stores, schools, and hotels, as well as being equally at home as paging systems in receptions courtrooms, or waiting rooms. The 5W multi-tap transformer allows a continuous power handling of 15watts with a driver sensitivity of 90dB. Using the optional CSS-BB4x6 backcan, the wiring installation can be completed before inspection, with a simple fitting of the speaker required.
Ceiling Loudspeakers. The CM two-way built-in low impedance loudspeaker can be used with a standard hi-fi or professional amplifier. It provides you with a powerful transparent and warm sound that covers the complete frequency band what makes this speaker suitable for the distribution of music at a higher volume level. The grill is made of aluminum what makes CM suitable to be used in humid environments. The loudspeaker is easy to install, due to its simple, quick mounting system with 3 screws. These screws are hidden behind the loudspeaker grill, which gives the loudspeaker a modern and striking design.
EN54 regulation is a good move for everybody in the business, but especially for the people who are in a building at a time of emergency. On the standards side, it has many positive effects, on the other hand it forces every stage of the market to provide quality — from the manufacturers to provide quality products, but also to the integrators who have to provide a quality installation. The focus is now on safety. In the beginning there was a lot of confusion but like anything new you have to learn it. For example, if you look at the German market, it is a very specialist market. Southern European countries like Greece, Italy, Spain and Portugal have been very slow to implement it, and EN54 projects are very low. If you compare EN54 speakers to non-EN54 speakers there is a huge price difference.
The procedure for planning a VAS requires experience in electroacoustics. The following example shall show you some aspects for such a planning. It illustrates a supermarket with the below specifications:.
She can and is right.
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