BASF melamine foam technology Basotect is being used in a new silencer for heating, ventilation and air conditioning equipment.
German firm Howatherm's unit uses Basotect as a passive component since the foam, which contains no glass or mineral fibres, is easy to process and contributes to both good acoustics and, thanks to its fire resistance, a high level of fire safety.
Dr Christoph Kaup, managing director of Howatherm Klimatechnik, says: “Owing to its very good absorption figures in the 500 to 5,000 Hz frequency range, we successfully use Basotect melamine foam as a passive sound absorber. Together with the active electroacoustic component, this material makes a crucial contribution to improving the sound damping values.”
For active sound cancellation in the lower frequency range below 125 Hz, the electroacoustic component emits a sound with a wavelength that superimposes the targeted existing sound wave in such a way that, ideally, the two waves cancel each other out.
This system is used in specialty air conditioning equipment that is installed in buildings such as theatres, concert halls, galleries and other venues in which acoustics may be of critical importance. Specialty air conditioning equipment influences ambient air by controlling temperature, humidity and air quality.