"The whole strata community owes a huge debt of gratitude to you and the OCN executive. Much appreciated."
2.4.13 Sound insulation and absorption
What is the difference between insulation and absorption? There is often confusion between sound insulation and sound absorption. Sound insulation is required in order to eliminate the sound path from a source to a receiver such as between apartments in a building, or to reduce unwanted external noise inside a concert hall. Heavy materials like concrete tend to be the best materials for sound insulation - doubling the mass per unit area of a wall will improve its insulation by about 6dB.