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  • 11.2 UNESCO World Heritage at 50
  • 11.1 Legacies of Detention, Isolation, and Quarantine
  • 10.2 Integrity
  • 10.1 Conservation: Discipline & Profession
  • 9.2 Sounding Heritage
  • 9.1 Heritage of War
  • 8.2 LGBTQ Heritage
  • 8.1 Gentrification and Heritage Conservation
  • 7.2 Design and the Historical Environment
  • 7.1 Landscapes of Extraction
  • 6.2 Therapeutic Landscapes
  • 6.1 Ruskin Redux
  • 5.2 Landscape and Climate Change
  • 5.1 Vandalism
  • 4.2 Venice Charter at 50
  • 4.1 Conserving the City
  • 3.2 Interpretation
  • 3.1 Nostalgia
  • 2.2 Adaptation
  • 2.1 Recording
  • 1.2 Documentation
  • 1.1 Repair
Change Over Time is a semiannual journal publishing original articles on the history, theory, and praxis of conservation and the built environment. Each issue is dedicated to a particular theme as a method to promote critical discourse on contemporary conservation issues from multiple perspectives both within the field and across disciplines. Themes are examined at all scales, from the global and regional to the microscopic and material.
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Concert Hall Acoustics and the Sounding Heritage of the Interwar Period in America: The Coolidge Auditorium (Library of Congress, Washington, DC, 1925) | Mark A. Pottinger

Concert Hall Acoustics and the Sounding Heritage of the Interwar Period in America: The Coolidge Auditorium (Library of Congress, Washington, DC, 1925) | Mark A. Pottinger

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9.2 Sounding Heritage

In 1895, when the young physicist Wallace Clement Sabine examined the reverberation time of a lecture hall on Harvard’s campus, the science of architectural acoustics…

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