The nonlinearities of audio devices can be emulated by means of a nonlinear convolution method, which is based on a particular case of the Volterra series called the Diagonal Volterra series. The Volterra kernel characterizes the nonlinear audio device being tested. Since the behavior of a nonlinear audio system may be influenced by input signal level and since Volterra kernels themselves depend upon the level of the input signal, a numerical and experimental method is presented that approximates the kernels for a continuous range of levels with a limited number of measurements. The model can be extended to handle an arbitrary order of nonlinearities to better emulate the harmonics of low and medium frequencies. This approach is particularly useful for such devices as a tube preamplifier.

Authors: Tronchin, Lamberto; Coli, Vanna Lisa
Affiliations: DIN-CIARM, University of Bologna, Bologna, Italy; Department of Physics, Computer Science and Mathematics, University of Modena and Reggio Emilia, Italy(See document for exact affiliation information.)
JAES Volume 63 Issue 9 pp. 671-683; September 2015
Publication Date: October 6, 2015

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.