London Bridge Station

London Bridge station is currently being rebuilt as part of the Thameslink Programme, providing more space and new facilities for passengers.

Acoustics Plus has been working on this iconic station for over 2 years to ensure that the proposed PA/VA system is compliant with the relevant standards.

We have undertaken detailed acoustic modelling of all public areas of the station.

The brief

  • Design the public address and voice alarm system for the main concourse, terminus concourse, and train platforms.

  • Carry out an acoustic computer modelling study to verify that the proposed acoustic design will meet the acoustic design criteria specified in the performance constraints.

  • Parameter prediction including reverberation time, sound pressure level and speech transmission index.

  • Post commissioning electro-acoustic performance assessment of intelligibility and sound pressure level.

The results

  • PA/VA system for new concourse is installed and operational.

  • Platform PA/VA system installed and operational.

What next

  • Commissioning of the system is set to commence in the coming months.

Celtic Football Club

THE BRIEF

Celtic Park is a football stadium in the Parkhead area of Glasgow and is the home ground of Celtic Football Club. Celtic Park, an all-seater stadium with a capacity of 60,411, is the largest football stadium in Scotland and the sixth-largest stadium in the United Kingdom. Acoustics Plus were instructed to design a new PA/VA system for the four main stands. Initially, Acoustics Plus conducted acoustic measurements (crowd noise levels) during a capacity-crowd match (Celtic vs Inter Milan). It identified that crowd noise sound pressure level (SPL) can consistently reach 100dBA for at least 10% of the measured period and can reach 115dBA during goal celebrations!

THE DESIGN

Utilising specialist CAD tools and acoustic modelling software and 3D model of the stadium was constructed and a number of loudspeaker layout options were modelled to determine what would provide the optimum coverage and intelligibility. Due to the required sound pressure levels to be achieved and the height of the roof structure, a line array solution was discounted early on in the design process.

The full range solution utilised EVF and EVH speakers by Electro Voice. The EVH series is a dedicated installed sound solution delivering exceptional value in venues of all sizes. These mid-sized 15-inch two-way cabinets feature a unique coaxial horn loaded design that is unmatched for pattern control and intelligibility in reverberant environments. EVF is a series of front-loaded loudspeaker systems offered for installed sound. Available in 12" or 15" two-way configurations, and enhanced with dedicated low-frequency systems, EVF loudspeakers match exceptional audio performance, efficiency, ease-of-use, and aesthetics with unprecedented value.


Thames Barrier

THE SCOPE

The Thames Barrier is one of the largest movable flood barriers in the world. The Thames Barrier spans 520 metres across the River Thames near Woolwich, and it protects 125 square kilometres of central London from flooding caused by tidal surges. It has 10 steel gates that can be raised into position across the River Thames. When raised, the main gates stand as high as a 5-storey building and as wide as the opening of Tower Bridge. Each main gate weighs 3,300 tonnes.

The uninterrupted operation of this barrier is vital to the protection of London, as is the safety of the employees that maintain it.

Acoustics Plus was commissioned to determine if the newly installed PA/VA system at the facility met the relevant legislative standards. We undertook measurements of both sound pressure level and speech intelligibility using the STI-PA method to assess its performance.


King’s Cross Train Station

Acoustics Plus were contracted by the communications company working on Network Rail’s £500 million redevelopment of King’s Cross to design and test a new public address and voice alarm system.

King’s Cross station is one of the busiest in the UK and struggles to cope with its 40 million-plus passengers a year – a figure set to increase. The redevelopment will address this problem, transforming the entire station by 2013. By the time of the 2012 Olympics, there will be a new concourse and an improved interchange with St Pancras International.

The brief

  • Design the public address and voice alarm system for the new western concourse, train platforms, and train sheds

  • Carry out an acoustic computer modelling study to verify that the proposed acoustic design will meet the acoustic design criteria specified in the performance constraints

  • Parameter prediction including reverberation time, sound pressure level and speech transmission index

  • Post commissioning electro-acoustic performance assessment of intelligibility and sound pressure level.

The acoustic design had to work within constraints dictated by the listed status of buildings at King’s Cross Station.

The results

  • PA-voice alarm system for new western concourse scheduled to be installed by 2012.

  • Platform PA-voice alarm system currently being installed


Aston Villa Football Club

Villa Park is a football stadium in Aston, Birmingham, England, with a seating capacity of 42,682. It has been the home of Aston Villa Football Club since 1897. The stadium has gone through various stages of renovation and development, resulting in the current stand configuration of the Holte End, Trinity Road Stand, North Stand and the Doug Ellis Stand.

THE BRIEF

Acoustics Plus was engaged by PEL Services to design a new PA/VA System for this prestigious football club. The existing system was nearing the end of its useful life and a much needed upgrade had been commissioned by Aston Villa FC.

THE DESIGN

Acoustics Plus undertook match day noise measurements during a feisty Midlands derby to determine typical crowd noise levels. This determined the selection of loudspeakers and their power handling capability. Using acoustic modelling software, a detailed acoustic design was undertaken using a mixture of Electro Voice EVFs and EVHs to provide a full range solution.

EASE model of Villa Park

THE RESULT

The Holte End has been fully installed and commissioned and is now providing match day entertainment. It is fully compliant with the relevant legislation and standards. The remaining stands are due to be installed in the near future.


Gautrain Rail Network – South Africa

Gautrain is South Africa’s new premier rail network connecting Pretoria with central Johannesburg and its airport.

Acoustics Plus were contracted by the communications company working for Gautrain’s owner to design and test the PA-voice alarm system for Gautrain’s ten new stations.

The brief

  • Design the public address and voice alarm system for Gautrain’s stations and platforms

  • Carry out an acoustic computer modelling study to verify that the proposed acoustic design will meet the acoustic design criteria specified in the performance constraints

  • Parameter prediction including reverberation time, sound pressure level and speech transmission index

  • Post commissioning electro-acoustic performance assessment of intelligibility and sound pressure level.

The acoustic design,installation and commissioning had to be delivered within a tight schedule, with a number of stations ready for operation in time for the 2010 Football World Cup.

The results

  • Installed PA-voice alarm system for first four train stations met the performance requirements specified by the operator. Commissioning of these stations took place under a tight schedule one week prior to opening.

  • Design work is continuing on Phase 2 of the project with a proposed installation and commissioning completion earmarked for the beginning of 2011.


Gatwick Airport Terminal & Interchange

We were contracted by the communications company working for Gatwick Airport’s owners to design and test a new public address and voice alarm system for the North Terminal Interchange.

The brief

  • Design the public address and voice alarm system for the North Terminal Interchange

  • Carry out an acoustic computer modelling study to verify that the proposed acoustic design will meet the acoustic design criteria specified in the performance constraints

  • Parameter prediction including reverberation time, sound pressure level and speech transmission index

  • Post commissioning electro-acoustic performance assessment of intelligibility and sound pressure level.

The acoustic design had to work with pre-determined loudspeaker positions and architectural constraints, as well as achieving compliance with the specified performance requirements.

The results

  • Installed system met the performance requirements specified by the airport operator, Global Infrastructure Partners.

  • Compliant PA-voice alarm system delivered within a tight time frame.