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Université Du Maine

Centre National De La Recherche Scientifique

Whylot Sas

Etienne Gaviot

Frédéric Polet

Romain Ravaud

Lionel Camberlain

Mehran Erza

Guillaume Failleau

Ronan Morice

Frederìc Polet

Véronique Le Sant

Bruno Beche

Lionel Camberlein

Morice Ronan

The present invention relates to an acoustic signal supply circuit of at least one loudspeaker (HP), this circuit comprising a filtering device of the resonance peak occurring at a given frequency of the supply current, characterized in that the filtering device of the peak is incorporated in a first branch bypassing the intermediate circuit between at least two converters (A, A), this filtering device being purely electrical in the form of an impedance (Z) connected, on the one hand, at a point on the intermediate circuit and, on the other hand, to a ground instrumentation, the impedance being called RLC (Z) for comprising at least one first resistor (R), at least one first capacitor (C) and at least one first inductor (L) arranged in series, the parameters of the first resistor (R), the first capacitor (C) and the first inductor (L) being predetermined as a function of the resonance peak to be filtered.

Device and method for filtering the resonance peak in a circuit for supplying at least one loud speaker upstream of the latter

The present invention relates to an acoustic signal supply circuit of at least one loudspeaker (HP) incorporating a filtering device of the resonance peak of said at least one loudspeaker (HP) occurring at a given frequency, characterized in that the filtering device of the resonance peak of said at least one loudspeaker (HP) is incorporated either into the first instrumentation ground circuit or in the feedback loop, this filtering device being purely electrical in the form an impedance incorporated in the first instrumentation ground circuit or in the feedback loop, the impedance parameters being predetermined as a function of the resonance peak to be filtered of said at least one loudspeaker (HP).

Device and method for filtering the resonance peak in a power supply circuit of at least one loudspeaker

The invention relates to a device for measuring a heat flux, comprising a thermopile formed of a plurality of thermojunctions of distributed type. The device is formed of a first and a second ceramic substrate (Ce, Ce), a first face of the first substrate (Ce) is composed of cavities which are separated by ceramic spacers (Ca, Ca, Ca, Ca), the thermopile is placed on a second planar face of the first substrate which is located opposite the first face, the spacers of the first substrate are arranged beneath one thermojunction (Tj, Tj, Tj, Tj) in two of the thermopile, a face of the second substrate (Ce) is composed of cavities which are separated by ceramic spacers (Ca, Ca, Ca, Ca, Ca), the spacers of the second substrate rest on a thermojunction (Tj, Tj, Tj, Tj, Tj) beneath which a spacer of the first substrate is not arranged.

Device for measuring a heat flux

Growing community of inventors

Le Mans, France

Etienne Gaviot