Transmission loss

Definition

• is the power of incident wave coming towards a defined area ;
• is the power of transmitted wave going away from the defined area.

  Applications

Electrical engineering

• Transmission Loss in electrical engineering describes the decrease of electrical power along an electrical cable. The term has its origins in telephony.

  Duct Acoustics

• Transmission Loss in duct acoustics describes the acoustic performances of a muffler like system.

  Room Acoustics

• Transmission Loss in room acoustics describes the decrease of sound intensity that is reduced by a wall or other structure at a given frequency.

  Underwater Acoustics

• Transmission Loss in underwater acoustics describes the decrease of sound intensity that is reduced by a bubble curtain or other damping structure at a given frequency. The same term is sometimes used to mean propagation loss, which is a measure of the reduction in sound intensity between the sound source and a receiver, defined as the difference between the source level and the sound pressure level at the receiver.