Professional building acoustics measurements for sound insulation (airborne and impact), reverberation time (RT60), facade sound insulation, and room acoustic characterization. Building acoustics measurements are required for building certification, planning compliance, building handover documentation, acoustic treatment specification, and the resolution of noise complaints between neighbors in residential, commercial, and educational buildings. Correct measurement technique and standards-compliant equipment are essential for results that will be accepted by building authorities and used in legal or contractual contexts.
Building acoustics covers a wide range of measurement types. For sound insulation between rooms, the measurement determines the apparent weighted sound reduction index (R'w) or the standardized level difference (DnT,w) — both referenced to ISO 16283-1. For floor impact sound, the standardized impact sound pressure level (L'nT,w) is measured per ISO 16283-2. For room acoustics, parameters such as reverberation time (T20, T30), early decay time (EDT), clarity (C80), and speech transmission index (STI) are measured per ISO 3382-1 and ISO 3382-2.
A typical airborne sound insulation measurement per ISO 16283-1 follows this sequence: (1) Measure the reverberation time in the receiving room at all required 1/3 octave frequencies — typically 100 Hz to 3.15 kHz. (2) Position the omnidirectional source in the source room in at least two positions. (3) For each source position, measure the space-averaged sound pressure level in the source room (at least 5 microphone positions) and in the receiving room (at least 5 microphone positions). (4) Calculate the standardized level difference DnT at each frequency from the measured levels and the receiving room reverberation time. (5) Apply frequency weighting to obtain the single-number DnT,w with C and Ctr adaptation terms per ISO 717-1. The Bedrock Elite i10 automates steps 4 and 5, and can store all measurement data with timestamps, position references, and automatic ISO 717-1 calculations for direct report generation.
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