# 6 // The pumps (Tear gravity) (2005)
Create a sound that consists of a sinuswave with a frequency of 0,3 hz/second. Make the sound very long. Connect two speakers (Æ 122-222 mm) to an amplifier. Play the sound through the amplifier. Play it very loud. A sinuswave with a frequency of 0,3 hz/sec is just barely a sound, it is an electric current. This will cause the membrane of the speakers to move up and down, like a lung, or a heart. The speakers are dead silent, no sound is heard. ATTENTION: if starting or ending the piece in the middle of the sound, make sure the volume of the amplifier is set to zero, otherwise your speakers may be damaged.