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Auralization (AUR) (discontinued)

This module is deprecated and not available for sale any more. Please see and use the Simulation-Auralization (SIM-AUR) module instead.
Please contact support(at)klippel(dot)de for details.

Digital simulation in real time
Electro-dynamical transducer (woofer, tweeter + enclosure)
Arbitrary input (music, test signals)
Simulates radiated sound in far field
Simulates transducer states permanently
Measures distortion components on-line
Adjustable signal distortion
Provides blind or open A/B-comparison
Investigates nonlinear behavior
Allows non-destructive testing
Explores effect of each nonlinearity
Finds dominant source of distortion
Assesses sound quality
Shows optimal performance/ cost ratio
Saves time and cost in prototyping
Substitutes time-consuming listening tests
Training of listeners

The module "Speaker Auralization" simulates the acoustic output of a loudspeaker (woofer, tweeter, system) in the far field on the basis of the identified large-signal model processed by the Distortion Analyzer in real time. Before processing any external input signal supplied to terminal IN1, the linear, nonlinear and thermal parameters of the loudspeaker are imported from the module "Large Signal Identification". An additional linear channel can be activated via a crossover system to transfer an audio signal with full band-width. The nonlinear and thermal effects of the transducer are represented by the states (displacement x(t), current I(t), temperature T_v(t),etc.) and parameter variations (R_e(t), Q_es(t)) recorded in the history file.
The data is stored in a data base for future visualization and interpretation. The dynamic generation of a DC part in the displacement, amplitude compression and jumping effects can be investigated in detail. The identified model allows for measurement of the nonlinear distortion d_Bl, d_C, d_L(x), d_L(i) seperately according to the source of the nonlinearity (force factor, compliance and inductance). In the simulated sound pressure signal p(t), the linear component p_lin(t) and each nonlinear component p_Bl(x), p_L(x), p_C(x), p_L(i) can be attenuated separately to modify the transfer response of the woofer and to investigate the impact on the subjective listening impression. Systematic listening tests can be performed by using the blind A/B switch.