Ondines (Latin: Onda — a wave) are elementals, enumerated as the water elementals in works of alchemy by Paracelsus. They also appear in European folklore as fairy-like creatures; the name may be used interchangeably with those of other water spirits.
According to a theory advanced by Paracelsus, an Ondine is a water nymph or water spirit, the elemental of water. They are usually found in forest pools and waterfalls. They have beautiful voices, which are sometimes heard over the sound of water.
A wavelet is a wave-like oscillation with an amplitude that starts out at zero, increases, and then decreases back to zero. As a mathematical tool, wavelets can be used to extract information from many different kinds of data, including audio signals and images.
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