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Impulse response

IMPROVING THE MEASUREMENT OF THE LOW FREQUENCY CONTENT OF THE IMPULSE RESPONSE USING ACOUSTIC PULSE REFLECTOMETRY

IMPROVING THE MEASUREMENT OF THE LOW FREQUENCY CONTENT OF THE IMPULSE RESPONSE USING ACOUSTIC PULSE REFLECTOMETRY

... this impulse response will therefore be equal to the amount by which both the DC component and the 25 Hz sinusoidal component are incorrectly ...the impulse response of Figure 8 (after the 'DC ...

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Energy Room Impulse Response Prediction by an Extended Image SourceHierarchical Radiosity Combined Method

Energy Room Impulse Response Prediction by an Extended Image SourceHierarchical Radiosity Combined Method

... The combined method is composed of two methods for solving for the energy propagation inside enclosures of arbitrary geometries and having walls with materials having different reflection coefficients and diffusivity ...

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Simulation of impulse response for indoor visible light communications using 3D CAD models

Simulation of impulse response for indoor visible light communications using 3D CAD models

... In this article, a tool for simulating the channel impulse response for indoor visible light communications using 3D computer-aided design (CAD) models is presented. The simulation tool is based on a ...

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Página 1 de 6 Technique for the Derivation of Wide Band Room Impulse Response

Página 1 de 6 Technique for the Derivation of Wide Band Room Impulse Response

... the impulse response. When it comes to capturing room impulse responses for auralisa- tion purposes, there is no alternative to sweep measure- ments: The high dynamic range in turn of 90 dB required ...

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ROOM IMPULSE RESPONSE USING SEGMENTED MAXIMUM LENGTH SEQUENCES (MLS) FOR ANNOYANCE MINIMIZATION

ROOM IMPULSE RESPONSE USING SEGMENTED MAXIMUM LENGTH SEQUENCES (MLS) FOR ANNOYANCE MINIMIZATION

... The impulse response of a room allows the estimation of its internal acoustical conditions and sound quality parameters, namely the frequency response and the reverberation ...

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ROOM SHAPE AND SIZE ESTIMATION USING DIRECTIONAL IMPULSE RESPONSE MEASUREMENTS

ROOM SHAPE AND SIZE ESTIMATION USING DIRECTIONAL IMPULSE RESPONSE MEASUREMENTS

... Directional Impulse Response (DIR) method described above was tested on 4 empty rooms with varying sizes and shapes. Rooms 1, 2 and 3 had carpet and room 4 had wood floor. The temperature of the rooms and ...

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INFLUENCE OF TIME-VARIANCE IN AUDITORIUM ON IMPULSE RESPONSE MEASUREMENT

INFLUENCE OF TIME-VARIANCE IN AUDITORIUM ON IMPULSE RESPONSE MEASUREMENT

... Since it is impossible to observe the temperature and air fluctuations in the total sound field in detail, acoustical data were used to estimate the extent of the time-variance in the medium. That is, the short-term ...

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Determination of Sound Reduction Index by impulse response measurements

Determination of Sound Reduction Index by impulse response measurements

... ABSTRACT: The Sound Reduction Index of a partition can be measured according to the method described by ISO 140. This paper reports experimental results obtained with a new measurement method based on the determination ...

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DETERMINATION OF TRUNCATION POINT OF ROOM IMPULSE RESPONSE

DETERMINATION OF TRUNCATION POINT OF ROOM IMPULSE RESPONSE

... the response beginning, and the noise influence is relatively small ...of response. However, overall noise energy in response influences the integrated impulse response since this ...

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CLEAN SEGMENT AND CONSTANT ENERGY SEQUENCES BASED ON MLS

CLEAN SEGMENT AND CONSTANT ENERGY SEQUENCES BASED ON MLS

... Fig. 6 depicts the qualitative results concerning to the Amplitude Impulse Response. The tests were performed using a sequence degree of K=15 convoluted with the IR of a physical room. A sampling frequency ...

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62 PREDICTIONS vs MEASUREMENTS IN ROOM ACOUSTICS: A DIFFICULT ADJUSTMENT

62 PREDICTIONS vs MEASUREMENTS IN ROOM ACOUSTICS: A DIFFICULT ADJUSTMENT

... Different ways could be used for room acoustics simulations that are required for physically based virtual acoustics. In theory, wave-based techniques offer the most accurate results. From the element methods, finite ...

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Efecto de la limitación de valores del algoritmo acelerador regresivo versión γ (arγ)

Efecto de la limitación de valores del algoritmo acelerador regresivo versión γ (arγ)

... (Finite Impulse Response) e IIR (Infinite Impulse Response) y para la realización de las pruebas mediante simulación, se implementaron los sistemas en Simulink, utilizando la aritmética de ...

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A Parallel Approach to HRTF Approximation and Interpolation Based on a Parametric Filter Model

A Parallel Approach to HRTF Approximation and Interpolation Based on a Parametric Filter Model

... infinite impulse response (IIR) parametric model presented by the authors in [7], aimed at approximating HRTF responses by using a chain of parametric digital filters such as the ones used in audio ...

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Geometrical room acoustics: ray based simulation for room acoustics

Geometrical room acoustics: ray based simulation for room acoustics

... Our ray tracing engine has been used to build a gallery of virtual en- vironments for the IP-RACINE European Integrated Project [Racine (2009)]. The main objective of IP-RACINE is to extend the state of the art and ...

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ON MODELLING OF ROOM ACOUSTICS BY A SOUND ENERGY TRANSITION APPROACH

ON MODELLING OF ROOM ACOUSTICS BY A SOUND ENERGY TRANSITION APPROACH

... squared impulse response [8, 9], all sound quality indexes depending on the decay curve at any point in the room can be calculated from the corresponding impulse ...the impulse response ...

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ACOUSTICAL MEASUREMENTS BY ADAPTIVE SYSTEM MODELING

ACOUSTICAL MEASUREMENTS BY ADAPTIVE SYSTEM MODELING

... The cumulative spectral decay plot also shows frequency and time- domain properties of a system. It is computed from the system’s impulse response by windowing and Fourier transformation. Unlike the ETFC, ...

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ANALYSIS OF A TIME-DOMAIN METHOD TO COMPUTE ULTRASONIC FIELD THROUGH INTERFACES

ANALYSIS OF A TIME-DOMAIN METHOD TO COMPUTE ULTRASONIC FIELD THROUGH INTERFACES

... potential impulse response h a ( r r i , t ) is calculated from equation (5) at the whole finite interface, which has also been approximated by a number of elements of small ...potential impulse ...

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In situ absorption measurement of antinoise devices using pre-determined pulse waveforms

In situ absorption measurement of antinoise devices using pre-determined pulse waveforms

... A Virtual Instrument (VI) was implemented for the in situ measurement of the absorption coefficient of noise barriers, α (f). The VI consist of an electroacoustic system, a NI DAQ PCI-6040E board, and a software package ...

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Collecting these response functions, the GIRF for the entire system is,

Collecting these response functions, the GIRF for the entire system is,

... Pesaran and Shin (1998) propose the generalized impulse response function (GIRF), an ordering-invariant approach, based on the work of Koop et al. (1996). The GIRF has been employed by many researchers: ...

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UN MODELO DE SIMULACION DE ECOGRAMAS EN RECINTOS PARA EXCITACIONES CON IMPULSOS DEBILMENTE ALINEALES

UN MODELO DE SIMULACION DE ECOGRAMAS EN RECINTOS PARA EXCITACIONES CON IMPULSOS DEBILMENTE ALINEALES

... A new model to account for spatial and time distribution of weakly sound sources is presented. This model is based on an additional energy decay accounted by means of a nonlinearity parameter and on the main ideas ...

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