LAEQ,T
LAEQ (or LAeq) refers to Level A weighted Equivalent Continuous Sound Pressure and T refers to time, so it is a metric used in acoustics to quantify the average sound energy of a fluctuating noise over a specific time period. It represents the constant noise level that would produce the same sound energy over the same period as the actual fluctuating noise.It is often used in environmental noise standards and regulations, most recently in particular connected with the noise produced by air source heat pumps and wind turbines. See article equivalent continuous sound pressure level, heat pump and wind turbine sound calculations, as well as sound, sound absorption, sound absorption coefficient, and noise v sound.
For the purposes of the consultation Permitted development rights for small scale renewable and low carbon energy technologies and electric vehicle charging infrastructure March 2012 LAEQ,T refers to 'The equivalent continuous sound level - the sound level of a notionally steady sound having the same energy as a fluctuating sound over a specified measurement period (T). LAEQ, 5 min – refers to the equivalent continuous sound level over a 5 minute period.' The consultation also notes that the term 'Could benefit from further clarification'.
[edit] Related articles on Designing Buildings
- Air source heat pumps.
- Biomass.
- BSRIA domestic hot water heat pumps testing.
- Domestic building services compliance guide.
- Feed-In tariff.
- Ground source heat pump.
- Making the most of renewable energy systems DG 531.
- Microgeneration certification scheme
- Micro CHP.
- Micro grid.
- Microgeneration.
- Noise v sound.
- Non-domestic building services compliance guide.
- Pre-completion sound testing.
- Renewable energy.
- Renewable Heat Incentive.
- Renewable Energy Consumer Code RECC.
- Solar photovoltaics.
- Solar thermal.
- Sound.
- Sound absorption.
- Sound absorption coefficient.
- Sound frequency.
- UKAS accreditation for sound absorption testing.
- Wind turbine.
Featured articles and news
Plumbing and heating for sustainability in new properties
Technical Engineer runs through changes in regulations, innovations in materials, and product systems.
Awareness of the Carbon Border Adjustment Mechanism
What CBAM is and what to do about it.
The new towns and strategic environmental assessments
12 locations of the New Towns Taskforce reduced to 7 within the new towns draft programme and open consultation.
Buildings that changed the future of architecture. Book review.
The Sustainability Pathfinder© Handbook
Built environment agency launches free Pathfinder© tool to help businesses progress sustainability strategies.
Government outcome to the late payment consultation, ECA reacts.
IHBC 2025 Gus Astley Student Award winners
Work on the role of hewing in UK historic conservation a win for Jack Parker of Oxford Brookes University.
Future Homes Building Standards and plug-in solar
Parts F and L amendments, the availability of solar panels and industry responses.
How later living housing can help solve the housing crisis
Unlocking homes, unlocking lives.
Preparing safety case reports for HRBs under the BSA
A new practical guide to preparing structural inputs for safety cases and safety case reports published by IStructE.
Male construction workers and prostate cancer
CIOB and Prostate Cancer UK encourage awareness of prostate cancer risks, and what to do about it.
The changed R&D tax landscape for Architects
Specialist gives a recap on tax changes for Research and Development, via the ACA newsletter.
Structured product data as a competitive advantage
NBS explain why accessible product data that works across digital systems is key.
Welsh retrofit workforce assessment
Welsh Government report confirms Wales faces major electrical skills shortage, warns ECA.
A now architectural practice looks back at its concept project for a sustainable oceanic settlement 25 years on.
Copyright and Artificial Intelligence
Government report and back track on copyright opt out for AI training but no clear preferred alternative as yet.
Embedding AI tools into architectural education
Beyond the render: LMU share how student led research is shaping the future of visualisation workflows.
Why document control still fails UK construction projects
A Chartered Quantity Surveyor explains what needs to change and how.
Inspiration for a new 2026 wave of Irish construction professionals.
New planning reforms and Warm Homes Bill
Take centre stage at UK Construction Week London.