In homes, air leaks dominate sound isolation more than the glazing itself

Evidence

In fact in the domestic situation the sound isolation is almost entirely dominated by air leaks and draught paths, and it is the removal of these that allow double-glazing salesmen to advertise a dramatic improve­ ment in sound isolation, despite having two 4 mm panes of glass in the double-glazing. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2173

Categorization

• CANDY: A fun fact: double-glazing’s advertised acoustic improvement mostly comes from sealing draughts, not the extra glass.
• XREF: connects to: Air leaks and ventilation paths defeat sound isolation more than walls do — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2124; Good sound isolation requires airtight structure that still lets occupants breathe; Effective sound isolation requires airtight construction, which conflicts with ventilation needs. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2127 (+5 more)

Broader Connections

• Air leaks and ventilation paths defeat sound isolation more than walls do #expands (0.95) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2124
• Sound isolation depends on flanking paths more than the barrier itself #expands (0.93) — David Howard, Jamie Angus, coustics and Psychoacoustics, 2169
• Sound isolation fails mainly through flanking paths like pipes and air leaks. #corroborates (0.92)
• Sound isolation is defeated mainly by flanking paths like air leaks and structure. #expands (0.88) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2124
• Dissimilar layers and reduced coupling raise real-world sound isolation. #expands (0.78) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2119
• Closed headphones gain isolation but become sensitive to leakage effects. #exemplifies (0.74) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 480
• Good sound isolation requires airtight structure that still lets occupants breathe #qualifies (0.72)
• Effective sound isolation requires airtight construction, which conflicts with ventilation needs. #qualifies (0.72) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2127