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Outdoor-Indoor Transmission Class (OITC) Ratings

Defined by the American Society of Testing and Materials (ASTM), OITC ratings measure exterior noise transmission through building facades. Working with an independent, fully accredited testing facility, Above All Store Fronts ensures all architectural products and materials adhere to building and project-specific codes.

Why Are OITC Ratings Important?

Noise pollution affects New Yorkers on a daily basis. And while some are able to drown out excessive sound coming from outside, it may have various negative repercussions, including but not limited to:

  • Productivity issues
  • Increased stress levels
  • Fatigue
  • Challenges for learning environments
  • Adverse effects on cardiovascular health
  • Decreased property values
  • Impaired cognitive function
  • In extreme cases, hearing damage

Consider some of the loud noises you may encounter while walking outside: car horns, airplanes and helicopters flying overhead, sirens, trains. Now imagine hearing those noises at a similar volume while inside your workplace or residence. OITC ratings provide the data necessary to prevent this from happening.

businessman looking out office window in the city

OITC ratings are especially important for architectural glazing, as windows tend to be less effective at blocking exterior acoustics. Therefore, thicker glass or specialized glazing may be utilized on buildings located in areas prone to noise pollution.

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