DIRAC is a valuable acoustics measurement tool for field and laboratory acoustics engineers, researchers and educational institutions. Users can compare the acoustics of one room with another, validate sound systems and perform scale model measurements. Based on the measurement and analysis of impulse responses, the tool supports a variety of measurement configurations.

USE SCENARIOS

• Measure the acoustics of any room, hall or space
• Measure speech intelligibility
• Check acoustics before and after modification
• Compare acoustics of different rooms
• Scale model measurements
• Test and validate sound systems
• Research and education on acoustics
• Troubleshooting room acoustics

Dirac is a software tool for field or laboratory acoustics engineers. It measures impulse responses and calculates various room acoustical parameters, according to the ISO 3382 and IEC 60268-16 standards. Improve your studio acoustics without breaking the bank. Dirac Live for Studio belongs to the Dirac Live family of technology and software. It features Dirac’s patented algorithm to digitally reduce the room impacts and enhance the accuracy of sound reproduction, from timing and frequency response to imaging.

Speech intelligibility measurements can be carried out in compliance with the IEC 60268-16 standard, for male and female voices, through an artificial mouth-directional loudspeaker sound source or through direct injection into a sound system, taking into account the impact of background noise.

In combination with Echo Speech Source Type 4720, speech intelligibility measurements can be performed quickly and easily. The Echo delivers a calibrated signal that is used by DIRAC to calculate different speech intelligibility parameters. The Echo/DIRAC combination also takes into account background noise levels.

Bruel & Kjaer Dirac Room Acoustic Software

Using OmniPower Sound Source Type 4292-L or OmniSource Loudspeaker Type 4295, the speech signal levels, impulse response and the background noise levels can all be acquired in a single pass. Plots of the STI vs. source-receiver distance can be created with a few mouse clicks.

With the minimum amount of measurements, DIRAC gives you L_p,A,S, L_p,A,S,4, D_2,S, STI, r_D and r_P.

CAPABILITIES

Dirac Room Acoustics Software

• Dual-channel room acoustics
• Compliant with ISO 3382 (room acoustics), ISO 18233 (analysis methods) and IEC 60268–16 (speech intelligibility)
• Quick and easy measurements using an optional calibrated speech source (Echo Speech Source Type 4720)
• Time reverse filtering to measure short reverberation times
• Impulse response editing with unlimited undo
• Auto measure for large rooms
• Predefined and user-defined parameters
• Auralisation of any sound played in a room, using the room’s impulse response
• Comparisons and statistics of results