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5 Posts in this encyclopedia category

Impact/footstep sound

Footstep sound is a type of solid-borne impact sound caused by people walking about on hard surfaces. Dedicated impact sound insulation materials (foams, non-wovens) can be used to minimize such sounds.

Impedance tube

An impedance tube serves for the measurement of a material's absorption coefficient and reflection rate in case of perpendicular sound incidence.

Impulse noise

Impulses are short sound events with sharply rising intensity. At workplaces that are subject to impulse noise, the sound pressure level must not exceed 140 dB.

Infrasound

Infrasound is air-borne sound with a frequency below 20 Hz. As the human ear cannot hear sounds with such low frequencies, infrasound with a low sound pressure level cannot be perceived by humans.

Insulation

(Sound) insulation is the act of hampering or blocking the propagation of sound with the help of appropriate insulating materials. The material reflects and redirects the sound waves in a different direction, reducing the sound intensity in the original direction of propagation. Effective sound insulation can be achieved using heavy materials such as heavy foils. Also our special foam products soni RESIST, soni PUR VS60 and soni PROTECT R offer excellent sound insulation values.

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