1. Sound transmission through multiple structures containing flexible blankets;Beranek;J. Acoust. Soc. Am.,1949
2. Transmission loss of multiple panels containing sound absorbing materials in a random incidence field;Ookura,1978
3. Mätning av ljudisolering;Jonasson,1990
4. Acoustics—Measurement of sound insulation in buildings and of building elements—Part 3: Laboratory measurements of airborne sound insulation of building elements;Committee draft for ISO 140-3,1990
5. Measurements of the sound reduction index with intensity technique;Jonasson,1991