Abstract: The invention relates to a sound broadcasting device comprising a high-frequency section including at least one high-frequency acoustic source (SHF), and a medium-frequency section including at least two medium-frequency sources (SMF), the acoustic sources (SHF, SMF) being vertically superposed, where the medium-frequency section comprises a lower sub-section, arranged below the high-frequency section and comprising at least one medium-frequency acoustic source (SMF), and an upper sub-section, arranged above the high-frequency section and comprising at least one medium-frequency acoustic source (SMF), where the vertical directivity of the high-frequency section has an incline, relative to the horizontal (H), that is substantially equal to the incline (?MF) of the vertical directivity of the medium-frequency section relative to the horizontal (H), so that the overall vertical directivity of the device has a non-zero incline (?Dir) relative to the horizontal (H).

Abstract: A method for producing a multi-channel audio signal from one or more sound object signals is disclosed, where, for each sound object signal a plurality of width signals is produced, the amplitudes of the width signals following a substantially Gaussian distribution. The width signals are processed to produce a plurality of pan signals which are mapped to at least one channel. Each channel in the audio signal is produced by combining the pan signals from each sound object. An apparatus for reproducing such a multi-channel audio signal is also disclosed, in which a plurality of first loudspeakers are provided spaced around a first arc forward of a predetermined listening zone, each of the first loudspeakers facing towards the listening zone and substantially equidistant therefrom. A plurality of second loudspeakers are provided spaced around a second arc behind the listening zone, each of the second loudspeakers facing towards the listening zone.

Abstract: The present invention relates to a device for measuring an electric current generated by an acoustic amplifier in order to actuate an acoustic speaker comprising: a resistor (1) positioned in series between the amplifier and the speaker; a voltage-to-current converter (3), the inputs of which are connected to the terminals of the resistor (1), and which proportionally converts the difference in voltage across the terminals of the shunt to a signal current; a first current mirror (7), the input of which is connected to the output of the voltage-to-current converter (3) and the output of which is connected to a current-to-voltage converter (5); a constant bias current generator (9) connected to an input of the voltage-to-current converter (3) and the output of which is connected to the current-to-voltage converter (5) via a second current mirror (11), and capable of generating a bias current such that the device operates in linear mode and without saturation regardless of the electric current generated by th

Abstract: The disclosure includes a sound system comprising at least one Digital Signal Processor control module, acting on a signal to the high-frequency transducer and on a signal to a mid-frequency transducer so as to apply, in a common frequency range, at least one magnitude parameter as well as at least one phase parameter so as to produce a directivity along the same angular sector as a directivity produced by the orientable shutters.

Abstract: The present invention relates to a device for measuring an electric current generated by an acoustic amplifier in order to actuate an acoustic speaker comprising: a resistor (1) positioned in series between the amplifier and the speaker; a voltage-to-current converter (3), the inputs of which are connected to the terminals of the resistor (1), and which proportionally converts the difference in voltage across the terminals of the shunt to a signal current; a first current mirror (7), the input of which is connected to the output of the voltage-to-current converter (3) and the output of which is connected to a current-to-voltage converter (5); a constant bias current generator (9) connected to an input of the voltage-to-current converter (3) and the output of which is connected to the current-to-voltage converter (5) via a second current mirror (11), and capable of generating a bias current such that the device operates in linear mode and without saturation regardless of the electric current generated by th

Abstract: The disclosure includes a sound system comprising at least one Digital Signal Processor control module, acting on a signal to the high-frequency transducer and on a signal to a mid-frequency transducer so as to apply, in a common frequency range, at least one magnitude parameter as well as at least one phase parameter so as to produce a directivity along the same angular sector as a directivity produced by the orientable shutters.

Abstract: The invention relates to a public address system including one or more loudspeakers, each of which is in particular equipped with a section for reproducing high-frequency sounds, including a wave expansion guide, which receives, at its input sound waves coming from a transducer and having, projecting in a plane, a form opening outwards from its input to its output for distributing, in a solid transmission angle, the sound waves coming from the expansion guide. According to the invention, the expansion guide includes one or more mobile flaps that can be moved by a movement made parallel to the plane, so as to enable the solid transmission angle of the sound waves to be adjusted.

Abstract: The invention relates to a public address system including one or more loudspeakers, each of which is in particular equipped with a section for reproducing high-frequency sounds, including a wave expansion guide, which receives, at its input sound waves coming from a transducer and having, projecting in a plane, a form opening outwards from its input to its output for distributing, in a solid transmission angle, the sound waves coming from the expansion guide. According to the invention, the expansion guide includes one or more mobile flaps that can be moved by a movement made parallel to the plane, so as to enable the solid transmission angle of the sound waves to be adjusted.

Abstract: A method of conveying toner material from a refill container is provided, wherein a refill container having an opening for the discharge of toner material is arranged in a receptacle device in a first substantially upright position. In this first position, the opening is closed by a closing device. The refill container is swiveled into the second position with bottom opening with the aid of the receptacle device. Toner material is taken from the refill container via a discharge opening provided in the closing device. Further, the invention relates to a device for conveying toner material and to an associated toner refill container.

Abstract: A method of conveying toner material from a refill container is provided, wherein a refill container having an opening for the discharge of toner material is arranged in a receptacle device in a first substantially upright position. In this first position, the opening is closed by a closing device. The refill container is swiveled into the second position with bottom opening with the aid of the receptacle device. Toner material is taken from the refill container via a discharge opening provided in the closing device. Further, the invention relates to a device for conveying toner material and to an associated toner refill container.

Abstract: A pneumatic toner feed mechanism for a developer station of a printer or copier is disclosed. The feed mechanism includes at least two storage containers which are separately allocated to the developer chambers of the developer station. The toner storage containers act as intermediate storage units which are linked to the developer chambers of the developer station by supply ducts. Toner is supplied from bottle-shaped transport containers by a vacuum transport mechanism to the toner storage containers. The transport mechanism includes controllable solenoid valves. The toner level is detected by way of a control mechanism that preferably includes associated capacitive sensors. When a level of toner in a storage container exceeds a predetermined level, the associated valves are opened thereby eliminating the vacuum and associated automatic toner refill. A controller or control means may include a priority control system which preferably refills the toner of the main printing color.

Abstract: A wave guide fitted at the output of a loudspeaker, in front of the membrane or in front of the orifice of a compression chamber, along the axis of the transducer being considered, and comprising a conduit which expands from its input to its output. The area of the output orifice of the wave guide is planar and oblong, that its conduit comprises a passage between the input orifice and the output area, adapted to guide the waves along a general direction from which the shortest paths allowed in the one or more passages are all of lengths which are practically identical from the input orifice to the output orifice of the conduit. The invention is for use in providing sound to large areas.