Soft dB Opus Suite Building Acoustics Module Airborne Sound Isolation between Rooms ASTM E 336_ISO 140-4 - Manual (Page 3)

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1 Introduction
Congratulations on your purchase of the Opus Suite STC module.
The Opus Software Suite is a Sound and Vibration software that contains several measurement
modules:
• SLM 4-ch module : 4-channels, Class 1 (IEC 61672 and ANSI S1.43)
• SLM & 3Vib module : 1 SLM channel (same as SLM 4-ch module) and 3 vibration channels
(ISO 8041 and ISO 2631)
• Data Logger module
• Building Acoustic module
• Sound Transmission (ASTM E 336/ISO 140-4)
• Reverberation Time (ISO 3382)
• Speech Privacy (ASTM E 2638 and ASTM E 1130)
• Building Vibration module (DIN 45669-1 and ANSI S2.46)
• Intensity module (IEC 1043)
The Opus Suite is intended to run on a Concerto. The software can also be installed on a computer if
an Alto-6ch or an I-Track unit is connected. Moreover, some post-processing functions are available
on a PC even if no compatible unit is detected.
The current user’s manual presents the STC Module.
General Specifications
Standards
Test Method ASTM E336-05 and Test Method ISO 140-4
Standard Test Method for Measurement of Airborne Sound Attenuation
between Rooms in Buildings.
Both standards are designed to measure the sound isolation a partition
between two rooms. The result is expressed as a Sound Transmission Class
(STC) index.
The two standards differ slightly in the frequency range that is considered
for the evaluation. The ASTM ranges from 125 to 4000 Hz. The ISO ranges
from 100 to 3150 Hz.
Software Features
• Intuitive interface for STC measurement
• Embedded noise generator (white or pink noise)
• Real time 1/3 octave band spectrum (IEC 1260 Type 1)
• Reverberation evaluation with auto interrupted method
• Automated calculation of the STC Index
• Expendable interface to allow repetitions of a measurement type.
• Multiple partitions in the same file
• Save, load and export measurement files