Patents Assigned to Klippel GmbH
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Patent number: 9584939Abstract: The invention provides an arrangement and a method for measuring the direct sound wrad radiated by an acoustical source under test (e.g. loudspeakers) under the influence of acoustic ambient noise sources Q1 and reflections at acoustical boundaries (e.g. room walls). An acquisition device measures a state variable pt(rm) of the sound field at a plurality of measurement points rm in a scanning range Gm by a sensor and generates a scanned data set pGm,tQ0,Q1. Based on this data set an analyzer determines the coefficients CradQ0 associated with expansion functions which are solutions of the wave equation. An identifier uses the scanned data set pGm,tQ0,Q1 for generating parameter information P for the analyzer which are the basis for separating the direct sound wrad from room reflections wref and other waves wsec scattered at the surface of the source under test.Type: GrantFiled: January 10, 2014Date of Patent: February 28, 2017Assignee: Klippel GmbHInventors: Wolfgang Klippel, Daniel Knobloch
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Patent number: 8964996Abstract: An arrangement and method for assessing the audibility and annoyance of at least one distortion component dn(t) with n=1, . . . , N in the output signal p(t) of a device under test, by generating a virtual auralization output signal pA(t) at the output of an auralization system. The output signal pA(t) contains the distortion component dn(t) at an adjustable magnitude according to a scaling factor Sn provided from a control input, and is supplied to a perceptive model and to a reproduction system used by a listener. The auralization system receives the distortion component dn(t) from a separator which receives a test signal xT(t) from the output of a microphone and a reference signal xR(t) from a reference system.Type: GrantFiled: February 13, 2013Date of Patent: February 24, 2015Assignee: Klippel GmbHInventors: Wolfgang Klippel, Marian Liebig
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Publication number: 20140198921Abstract: The invention provides an arrangement and a method for measuring the direct sound wrad radiated by an acoustical source under test (e.g. loudspeakers) under the influence of acoustic ambient noise sources Q1 and reflections at acoustical boundaries (e.g. room walls). An acquisition device measures a state variable pt(rm) of the sound field at a plurality of measurement points rm in a scanning range Gm by a sensor and generates a scanned data set PGm,tQ0Q1. Based on this data set an analyzer determines the coefficients CradQ0 associated with expansion functions which are solutions of the wave equation. An identifier uses the scanned data set pGm,tQ0,Q1 for generating parameter information P for the analyzer which are the basis for separating the direct sound wrad from room reflections Wref and other waves wsec scattered at the surface of the source under test.Type: ApplicationFiled: January 10, 2014Publication date: July 17, 2014Applicant: Klippel GmbHInventors: Wolfgang Klippel, Daniel Knobloch
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Patent number: 7221167Abstract: The invention relates to an arrangement for measuring and assessing properties of a system (28) which transfers an electrical, mechanical or acoustical signal or converts an excitation signal x into another signal y. An error system (30) models the transfer behavior of the system, estimates a desired output signal y?, and generates an error signal e which reveals the excess distortion and disturbances of the output signal y at any time instant t, and can reveal peak values of transient distortion having low power which might otherwise be masked by noise and regular distortion. The error signal is supplied to an assessment system (44), where convenient distortion measures are calculated and the distortion is displayed versus properties of the signal (e.g., instantaneous frequency and amplitude). The assessment system may also generate a control output (42) to modify signal x to ensure an optimal excitation of the system.Type: GrantFiled: February 28, 2003Date of Patent: May 22, 2007Assignee: Klippel GmbHInventors: Wolfgang Klippel, Ulf Seidel
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Publication number: 20030187636Abstract: The invention relates to an arrangement for measuring and assessing properties of a system (28) which transfers an electrical, mechanical or acoustical signal or converts an excitation signal x into another signal y. An error system (30) models the transfer behavior of the system, estimates a desired output signal y′, and generates an error signal e which reveals the excess distortion and disturbances of the output signal y at any time instant t, and can reveal peak values of transient distortion having low power which might otherwise be masked by noise and regular distortion. The error signal is supplied to an assessment system (44), where convenient distortion measures are calculated and the distortion is displayed versus properties of the signal (e.g., instantaneous frequency and amplitude). The assessment system may also generate a control output (42) to modify signal x to ensure an optimal excitation of the system.Type: ApplicationFiled: February 28, 2003Publication date: October 2, 2003Applicant: KLIPPEL GmbHInventors: Wolfgang Klippel, Ulf Seidel