Sound and Acoustics

	Small Singing Stone If you place your head in the stone’s hollow and hum different notes it is possible to find the note at which resonance occurs, and this causes a pleasant gently vibrating sensation throughout your body. You are transported into your own private world.		Large Singing Stone If you put your head into the hollow of this giant stone, which weighs tonnes, and hum different notes, you can retreat into a separate, complete world. You can discover "your" note where resonance occurs and this causes a gentle sensation throughout your whole body.
	Tuning Stone It is a well-known fact that, together with the eyes, the ears perceive a great amount of sensory impressions. However, not many of us know how many interesting sounds can be produced by tapping a stone.		Stone Harp With this stone you can create wonderful sounds which resemble the heavenly sounds of a harp. The precisely measured, deep cuts enable the stone to produce a full range of tones. The shorter the cut, the higher the tone.
	Stone Xylophone Stones are not mute. Being able to generate a sound from the oversized stones of the giant xylophone is a moving experience. Tapping the solid, heavy granite, marble or volcanic stone with a rubber hammer produces a wealth of sounds and harmonies which has an exciting effect on people.		Triangle Tone is not just a noise but a sound which the ear perceives as pure and of constant pitch. Each material has its own sound pattern. Metal bars create a particularly high-quality sound if bent into a triangle, and make especially pure vibrations audible.
	Gong The skin can also perceive sound. Sound waves, especially those from gongs, are not only perceived by the ear but also by the skin. Every material has its own typical sound. In order to create this sound the material needs to be made into a form typical to this material. The gong, along with the triangle and bells, is a typical design for metal.		Metal Gong The force and rhythm with which the Metal Gongs are struck gives rise to different sounds and resonances. Each metal disc produces a particular range of sound. Together they make melodic games and sound experiments possible. There are calming sounds which find resonance in particular areas of the body, head, neck, chest or stomach, depending on pitch.
	Sound Chord Just like a harp, you can pluck the strings and create harmonic, relatively deep and long-lasting multiphonic notes. The vibration of the strings and the ensuing sound can literally be seen with the eyes. The spectrum of notes extends over a complete octave		Tubular Chimes If the respective shape and alloy is used for metal pipes to create the perfect sound then they are called Tubular Chimes. They have been specially tuned for optimal sound with 1 major and 1 minor note around a common central note.
	Wind Harp Eddy currents which can be observed in water can also be found in a similar form in the air. These invisible phenomena are transformed into a soft heavenly sound by the Wind Harp which is also called the Aeolian Harp. Air is not only the carrier for the sound, but the air vortexes themselves produce sounds.		Dendrophone single field The Dendrophone is made up of harmoniously tuned sound boards which have been arranged like an oversized xylophone. If the lengths of the sound elements are changed different tones are produced and these are tuned and amplified with resonators.
	Sound Arch with 5 tones The Sound Arch which consists of 5 wooden sound tubes can be played from both sides at the same time. This has the effect of particularly encouraging the participants to play together and listen to each other.		Sound Leaf The individual sound plates have a tone like the clang of a cymbal. The stylised leaves are attached to the tree in a way that they can move freely. They produce a very cheerful and lively sound.
	Conference Sound behaves in similar ways to water which is why it can be directed through tubes as was done in old ship’s telephones. Between two and four speaking/listening stations can be installed and these are connected by underground pipes and a special sound distributor. It is possible to communicate over unusually long distances without the use of any electronic amplifiers.		Listening to Water We recommend installing a play station at the start of educational water trails, fields of experience and also in entrances to playgrounds where they serve the purpose of preparing the arriving participant for the following sensory and perceptional experiences. The play station "Listening to Water" is suitable for this purpose.
	Melodic Fence, melody Little John Every culture has its melodies which stay alive by frequent repetition. The melodic fence gives you this opportunity to play these melodies as a chorus or as a canon or even backwards if you want to. The fence has been tuned with little familiar melodies such as "Frère Jacques". Other melodies within an octave tone range are possible.		Wind Pipes The Wind Pipes are simple sound equipment which enables the person „playing them“ to experience physically the relation of cause and effect. The three at ground level integrated see-saw beams can be moved independently from each other. Due to the movement of the beams, the air pressure which is required for playing the pipes is produced.
	Sound Cushions The Sound Cushions provide an attractive activity for nearly all ages. Tones are produced by hopping on, or running over the cushions. Surprising tone sequences are produced, interrupted by amusing squeaks. This is a game for children and adults. As installation takes place using ground anchors rather than foundations, the tones can be changed any time.		Musical Path A rubber belt runs over three movable transverse timbers and is fixed in the ground at either end. The movements and loads created by running and jumping on the bridge are distributed from one section to another and influence each other. The combination of movements promote co-operative play and always has a surprise in store when running and jumping.
	Sound Roller By turning the individual rollers, different sounds are generated. Participants can balance by standing on the rollers or sit on the ropes pushing the rollers with their feet. Sounds are generated in an amusing way on the sound roller while sense of balance is improved.		Wind Pumps Three wooden columns with pump handles are placed around a central post. Raising and lowering the levers produces air pressure which drives sound elements. Pumping produces different triads. Playing together with the Wind Pump produces elementary experience of rhythm and tone using simple hand movements.
	Bell Tower The Bell Tower is an attractive eye- catcher for play areas and leisure areas. Because of its size and design, it is suitable for marking special areas and giving them an unmistakable character. The Bell Tower is enjoyed by nearly everyone. When the hanging ropes are pulled, the sound elements are set in motion and produce a whole range of tones.		Sea Roarer The play possibilities of this element are not apparent until the user steps onto the stainless steel platform and discovers the rocking, jumping and pivotally rotating movements it allows. These movements are fun and increased play value is achieved when users interact with each other.
	Phones The Phones are an attractive play item which confront people with the physical phenomena of sound waves and sound wave transmission during play. Children are fascinated when they can actually hear the voice of their play partner clearly at a distance of approximately 15 m.		Dance Chimes The Dance Chimes connect movement with experience of sounds. People of nearly all ages enjoy producing bright tones by hopping, jumping, or even dancing. Few play items produce so much smiling as this one. Both the spectators and listeners feel a moment of lightness, joy and harmony.
	Street Musicians 1, stainless steel The installation „Street Musicians“ is of a high artistic effect and gives a special accent to public places and play areas. The triangular figures are made of stainless steel, have a coloured small head and can be turned around their middle axis.