Sound sources

Whether for performance venues, architectural measurements, or work-place acoustics, reverberation time is a key parameter for characterizing a room. Reverberation time data provides information about the quality of sound as perceived by the audience in a room. A long reverberation time can make speech less intelligible, and music more pleasing. Too short a reverberation time can muffle speech and make a room sound “thin.”  Reverberation time sound level meter Larson Davis 831C-RT with Room Acoustics Firmware 831C-RA offers reverberation time measurement and calculation.

• Calculates reverberation time (RT60)
• Ensures measurement reliability with ensemble averaging
• Serves as pink and white noise source
• Supports optional amplifiers and omni-directional or façade speakers
• Triggers measurement automatically
• 1/1 and 1/3 octave filters supported
• Offers measurement quality indicators and grading.

Impulsive sound source Larson Davis BAS006 is an innovative device used to create impulsive noise that includes low frequency energy and avoids problems like secondary bounce.

• Use for ISO 10140, ISO 140, DIN 52210,and BS 5821 Measurements
• Maintenance Free Design
• Simple, Easy-to-Use.

Omnidirectional sound source Larson Davis BAS001 is designed to generate omnidirectional sound fields for making standard compliant measurements including: reverberation time (ISO 3382, ASTM E2235), building acoustics (insertion loss, acoustic absorption area, etc: ISO 140-4 ISO 140-3, ASTM E336, ASTM E90, DIN 55 210).

• Used for ISO 140-4, ISO 140-3, ISO 3382, DIN55210, ASTM E90, E336, E2235, C426 compliant measurements
• High sound power level output
• Acoustically Isotropic Source
• Available lightweight & compact amplifier (BAS002E/U).

When coupled with the Omnidirectional sound source BAS001 or Directional sound source BAS003, the Sound source speaker amplifier Larson Davis BAS002 is the ideal sound source for making room and building acoustics measurements.

• 500 W Output Power
• 5 Hz to 60 kHz bandwidth
• THD + N <0.12%
• Remote Control.

Directional sound source Larson Davis BAS003 is designed to generate homogeneous sound fields using random noise in compliance with the following standards: Building acoustics (insertion loss, acoustic absorption area, etc: ISO 140-3, ASTM E90, ISO 140-5, ASTM E966).

• Used for ISO 140-3, ASTM E90, ISO 140-5, ASTM E966 compliant measurements
• High sound power output level
• Insertion loss of noise barriers
• Available lightweight & compact amplifier (BAS002E/U)
• Shipping case standard.

Impact noise source tapping machine Larson Davis BAS004 is used to simulate foot fall noise in a manner that is well controlled and reproducible so that measured results can be replicated and compared with other measurements.

• Use for ISO 10140, ISO 140, DIN 52210, BS 5821, ASTME 492 Measurements
• Maintenance-Free Design
• PTB Type Approved
• Battery Operated
• Remote Control Included.