Reference Sound Source Models REF500 & REF600 Highlights I Extremely flat frequency response 1/2 HP industrial motor mounted on heavy duty vibration isolators Long life ball bearings Sturdy, rugged and reliable Sound power equalized to 88.8 dB re 1 pW, A-weighted (REF500) Sound Power Determination per Referenced Standards Qualification Tests on Acoustical Environments Sound Absorption Determination by the Steady-state Method Sound Power Determination In-situ The REF500 (120/240V, 50Hz) and REF600 (120/240V, 60Hz) Reference Sound Sources are an excellent tool for providing accurate and repeatable reference sound levels. These sources offer extremely flat response over a broad frequency range and are ideal for use in such applications as sound power, sound absorption, and sound insulation measurements. The REF500/600 can be used for qualification tests on acoustical environments, sound absorption determination by the steady-state method and for Sound Power determination. Designed for sound power determination using testing against these standards: ANSI Standards ANSI 12.31 ANSI 12.32 ANSI 12.33 ANSI 12.34 ANSI 12.36 Larson Davis

REF600 Standard Compliance ISO 6926-1999 Acoustics - Determination of the sound power levels of noise sources. Requirement for the performance and calibration of reference sound sources ANSI S12.5-1990 (R 1997) American National Standard Requirement for the Performance and Calibration of Reference Sound Sources 92 dB re 1 pW, A-weighted 2 dB in 100 - 10,000 Hz range for adjacent bands Max difference between 1/3rd octave bands 5 dB in 100 - 10,000 Hz range for any two bands 7 dB max vertical, 0.5 dB max horizontal Directivity index (1/3rd octave band) Repeatability Variation of sound power with...