Sound sources

For the proper measurement of building acoustics a range of sound sources is required that should fulfil the relevant standards, for example ISO140.
Brüel & Kjær's range of sound sources are optimised for building acoustics and include omnidirectional sources for excitation of rooms and partitions, and tapping machines for floor excitation.

		Type number

		Light - OmniPower Sound Source - Type 4292 Types 4292-L and 4295 are designed for airborne noise transmission measurements.


		OmniSource Loudspeaker - Type 4295 Type 4295 OmniSource Sound Source Type 4295 presents a new solution to omnidirectional sound source design. OmniSource is optimised for the measurement of room acoustic quantities, such as reverberation time, sound distribution and spatial decay.


		OmniSource with 4299 Volume Velocity Adaptor - Type 4295 OmniSource covers the most important frequency range for the automotive industry, that is, from 50 Hz to around 6 kHz. Volume Velocity Sources are used as "acoustical shakers" to measure acoustic transfer functions, typically in connection...


		Tapping Machine - Type 3207 Tapping Machine Type 3207 is an impact sound generator. It can be used for impact sound measurements to national and international standards. The unit is available with an optional battery kit and a remote control.


		Reference Sound Source - Type 4204 Reference Sound Source Type 4204 is a calibrated source of sound power with well defined operating characteristics and a predictable performance. It is rugged, compact and stable, and is therefore suitable for both field and laboratory use.


		Power Amplifier Type 2716 Audio Power Amplifier Type 2716-C is a high-performance power amplifier optimised for sound and vibration applications. It can be used as a general-purpose power amplifier for electroacoustic applications.


		Power Amplifier Type 2734 Type 2734 Power Amplifier is designed to power sound sources in building and room acoustic field measurements.


		Power amplifier - Type 2713 Designed to drive highly capacitive transducers to high voltage levels, such as when hydrophones Types 8103, 8104 or 8105 are employed as projectors in underwater calibration arrangements.