Mute Acoustics

Mute Acoustics

Acoustic Modular Wall System

+44 (0) 20 3858 0833 www.akustak.com

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ExCel District Energy Centre

ExCel District Energy Centre

Mute Acoustics

The ExCel District Energy Centre provides heat and power to the ExCel Exhibition Centre and surrounding area, through the use of Combined Heat & Power engines (CHP). Airborne sound, emanating from these engines, was the cause of continuous noise nuisance complaints from the adjoining residential dwelling-apartments. Akustak® was specified to mitigate the problem, from the Energy Centre side. It's modular construction and manoeuvrability (particularly at height and within confined spaces), made Akustak® the perfect application for this logistically challenging project. The modules were modified to suit the rigours of an industrial environment, including a fire-treated, impact resistant fascia; ensuring the installation is fit-for-purpose, for years to come. Following the installation, sound levels, in the adjoining dwelling-apartments, were assessed to be between 23 to 30 dB (LAeq). On this basis, World Health Organization guidelines were successfully met, as stipulated by the local authority, i.e. in bedrooms at night, the guidance limit is 30 dB LAeq, 8h and 35 dB LAeq, 16h for living rooms and bedrooms, during the day.
St. Pancras Chambers

St. Pancras Chambers

Mute Acoustics

The grade I listed, St. Pancras Chambers, originally built in 1873, is comprised 67 luxury apartments and the five-star Renassance St Pancras. Some of the apartments are affected by noise ingress, emanating from passing underground trains. Akustak® was specified to mitigate the problem, in relation to an apartment located on the 4th and 5th floors. The installation involved replacing the existing lightweight, metal framed, wall linings, which, prior testing demonstrated, were propagating significant vibration acceleration levels, compared with the supporting masonry walls; in one test position, for example, 16.20 mm/s2 versus 2.23 mm/s2. Critically, acceleration in vibration, results in an amplification of reradiated noise – in this case, noise levels, during train pass-bys reached 35 dB (LAFmax), whilst background noise levels (when no trains were passing) measured 27 dB (LAeq). By way of a guide, BS 4142 (one of the UK’s most widely used standards for the assessment of environmental noise) states that where noise is around 5 dB higher than the background noise level, this is an indication of an "adverse impact", whilst, where noise is 10 dB or more higher than the background noise level, this is an indication of a "significant adverse impact".   Pre-completion, sound insulation test data coming soon. Whilst Akustak® was employed here for its acoustical properties, on a logistical level too, it was a befitting application. Prefabricated and portable, it minimised project timescales and disruption, generally, within a highly populated building, where access for construction materials, particularly to the upper floors, is limited.

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