Big Picture Concepts Regarding Sound and Noise.

Types of Sound

Direct Sound

Direct sound travels from its source in a straight line to the ear, and typically comprises less than 1% of the total sound in a room. Even in electronically amplified spaces with large speaker systems, the Direct Sound that reaches the ear is typically only a fraction of a percent. That means reflections (Indirect Sound) make up 99% of what is heard.

These two types of complimentary sound together create the acoustic signature of a space.


Indirect Sound

Indirect Sound reaches the ear after reflecting off various interior surfaces and room boundaries. Since Indirect Sound accounts for more than 99% of the sound, its affect on listening is preeminent. Our surface treatment solutions redirect, diffuse and absorb reflections, allowing us to shape the acoustical environment to suit any need.

Types of Noise


Hearing through this type of noise is like viewing a film in a theater with fluorescent lighting; the image is visible, but vague. Operational systems like light ballasts, projector fans, motors, and sound system hiss/hum, are typical sources.


The intrusive effect of this type of noise is similar to light pouring into a dark theater when someone opens a door. It interferes with hearing by way of distraction. Sources like HVAC, plumbing, active adjacent spaces, rain, wind, and traffic are common.


This is simply noise created by the occupants of the space. People instinctively lower their voices and hush their movements in quiet spaces. As a result, decreasing the other noise types also reduces Autogenous Noise.

Paths of Noise

Airborne Transmissions

Doors, windows, and ductwork are frequently the primary contributors to airborne sound transmission. We identify vulnerabilities, locate hidden leaks, and recommend solutions.

Structural Transmissions

Wall, floor, and ceiling sound transmission isolation can be achieved in varying degrees depending on needs. We recommend a complete range of solutions from simple gap joints and hat channel options to room-within-room construction, floating-floors, and other customized solutions.

Mechanical Transmissions

HVAC, plumbing, and other systems commonly create sound transmission paths within a structure. We provide specific recommendations to remedy these issues.