Sound Sources

Sound sources such as impact generators, loudspeakers and power amplifiers designed for room and building acoustics measurements. Each sound source ensures full compliance with both national and international standards.

Fine tuning acoustic isolation in buildings

Loudspeakers
A loudspeaker is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. HBK offers professional loudspeakers fulfilling the standards to measure to measure sound insulation and perform room and building acoustics measurements.
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Tapping machines
Tapping Machines are an impact sound generator for measuring impact sound levels using hammers via tappets.
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Power amplifiers
Power amplifier designed for electroacoustic, room and building acoustics measurements and general-purpose applications.
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SOUND SOURCES AND AMPLIFIERS

A sound source that fulfills the standards for building acoustic measurements is required for professional use. HBK offers a complete range of sound sources for room and building acoustics, including our Tapping Machine, and 12-speaker omnidirectional OmniPower™ Sound Source. The sound sources are ideal with our range of Power Amplifiers and provide a flexible setup for any acoustic task with features such as wireless signal transmission for unhindered measurement range and flexibility.

Reference Sound Source is intended for use as a reference source for determination of the sound power output of equipment by the various comparison methods including the method described in ISO 3741, and by the survey methods described in ISO 3747.

USE SCENARIOS

Comparison method for determination of sound power of noise sources according to ISO 3741
Substitution and Juxtaposition methods for determination of sound power of noise sources according to ISO 3747
Sound absorption measurements
Sound insulation measurements

Reference Sound Source uses a specially designed centrifugal fan driven by a powerful asynchronous motor. The motor is of the external rotor type, and due to the high moment of inertia of the rotor it has a very constant speed of rotation. The motor is mounted on a cast aluminium base, shaped to minimize reflections. The complete assembly of motor and fan is mounted in a cylindrical safety grid fitted with two carrying handles.

Additional features of the compact and rugged product include long-term stability, an individual calibration chart and a safety grid.

CAPABILITIES

Fulfills ISO 3741, ISO 3747 and ISO 6926 for calibrated sound power sources
Frequency range from 100Hz to 20 kHz
Sound power output 91 dB re 1 pW (A-weighted, 50 Hz line frequency) and 95 dB re 1 pW (A- weighted, 60 Hz line frequency)
Temperature range –10°C to + 50°C
50 and 60 Hz operation

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