Abstract: The invention relates to a sealing material (1) having a first layer (2) which is formed by a textile fabric made of synthetic fibers (22) and has a thickness d1, and a second layer (3) which is formed by an adhesive material and has a thickness d2, wherein the two layers (2, 3) of the sealing material (1) penetrate one another when a force is applied perpendicularly to the extension of the layers (2, 3), such that a sealing layer (1?) is formed having a thickness D where 0.9·d1?D?1.1·d1.

Abstract: A method for reconstructing a data spectrogram disturbed by noise and/or echo is described, wherein spectrogram data is subjected to an awarding of a reliability measure, and wherein the spectrogram data having a low reliability measure is replace by more reliable data. In particular the replacement is carried out by employing spectrogram data having a higher reliability measure as a means for selecting a code-book entry where said more reliable data is stored. Such a code-book is easy to implement, and this method avoids correlation calculations, inversions of matrices and limitations as to the specific types of used statistical models. The reconstruction method improves speech recognition results, which is important for voice controlled devices.

Abstract: An echo canceller comprises a signal input for a far end signal, an audio input for a distorted desired signal, an echo estimator coupled to the signal input, and a spectral subtracter coupled to the echo estimator and the audio input. The echo estimator further comprises digital filter means covering a time span of at least a part of the echo to be cancelled. Spectral subtraction of the echo part does not make use of echo phase information. Consequently this saves memory and processing power of calculations made in the echo canceller. Futhermore these calculations are not restricted to a particular decaying course of the room impulse response, as any kind of echo tail course may be modelled. This provides a larger degree of freedom in practical embodiments and broadens the application area of the echo canceller.