BS EN 61012:1998, IEC 61012:1990

Filters for the measurement of audible sound in the presence of ultrasound|Acoustic equipment, Acoustic filters, Acoustic measurement, Sound-level meters, Acoustics, Sound intensity, Attenuation, Frequencies, Audiofrequencies, Ultrasonic frequencies, Marking, Frequency response, Tolerances (measurement), Sensitivity Click the banner to get it at ONLY: GBP116.00