Philharmonie de Paris

Paris, France

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Hepburn Wind Farm

Hepburn, Australia

Jiangsu Grand Theatre


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City Rail Link

Auckland, New Zealand

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City of Perth Library

Perth, Australia

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Waterview Tunnel

Auckland, New Zealand

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Geelong Grammar School: School of Performing Arts and Creative Design

Geelong, Australia

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Marshall Day Acoustics

Established in 1981, Marshall Day Acoustics has grown to become one of the world's largest and most respected acoustic consultancies.

For over 30 years, we have been providing the highest standard of architectural and environmental acoustic consulting.

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From concert halls to wind farms and everything in between, we have experts in every field of acoustics


Clear and intelligible speech communication is essential to the learning process.

Acoustic conditions in classrooms must support a wide variety of teaching methods. Speech clarity, noise intrusion and sound transfer are key areas of concern while specialist uses such as music and technology provide additional challenges.

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Marshall Day Entertech, our Theatre Design division

A perfect complement to our Acoustic Design services, Marshall Day Entertech provides full Theatre Design consultancy. Together we we provide an unrivalled level of services to drama, music, dance and educational sectors.

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We distribute and develop a number of high quality acoustical design tools that are in use by acoustics professionals on every continent

IRIS is a powerful and user friendly system for capturing and analysing room impulses in 3D

IRIS provides intuitive and interactive visualisations of room impulse responses which enables practitioners to easily relate the architecture and geometry of a space to how it sounds.

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