A method of digital sound synthesis, double frequency modulation (DFM), is defined in terms of two modulating frequencies. Its spectral equation is derived and the harmonic spacing shown to be dependent on the ratio of the two frequencies. The real-time generation of musical sounds by DFM is demonstrated. DFM offers superior control of harmonic envelopes than simple FM, but with less computatio...

Combining theoretical and experimental studies show that optical injection strongly changes the behavior of the linewidth enhancement factor (α(H)-factor) and the FM-to-AM indices ratio (FAIR) in quantum dash/dot semiconductor lasers. In contrast to solitary lasers, both the α(H)-factor and the FAIR at low-frequency modulation are reduced by optical injection. At high modulation frequency, howe...

This paper proposes the Frequency Modulation Neural Network as an alternative to current neuralnet models. This proposal is for an architecture of a heterogeneous neural-network in which information is propagated using frequency modulation of pulses oscillated by groups of neurons. The FMNN model enables operations including variable-binding, sequential recognitions and predictions. The use of ...

Mats Høvin1, Alf Olsen2, Tor Sverre Lande1 and Chris Toumazou3 1Dept. of Informatics, University of Oslo, Blindern, N-0316 Oslo, Norway 2Schlumberger Geco-Prackla, Jongsåsveien 4, N-1300 Sandvika, Norway 3Dept. of Electrical & Electronic Engineering, Imperial College, Exhibition Road, London SW7 2BT, UK Abstract— This paper describes a new first and secondorder delta-sigma modulator (DSM) conce...

The results of the study features formation and processing signals autodyne short-range radar systems (SRR) with frequency modulation (FM) involving non-linearity characteristic are presented. numerical simulation nonlinear influence on shape spectrum signal is implemented basis mathematical model generator. We have established that even a small this causes significant distortion signal. A meth...

BACKGROUND Although enhanced temporal summation (TS) and conditioned pain modulation (CPM), as characteristic for central sensitization, has been proved to be impaired in different chronic pain populations, the exact nature is still unknown. OBJECTIVES We examined differences in TS and CPM in 2 chronic pain populations, patients with both chronic fatigue syndrome (CFS) and comorbid fibromyalg...

The infrequent occurrence of a transient feature (deviance; e.g., frequency modulation, FM) in one of the regular occurring sinusoidal tones (standards) elicits the deviance related mismatch negativity (MMN) component of the event-related brain potential. Based on a memory-based comparison, MMN reflects the mismatch between the representations of incoming and standard sounds. The present study ...

The low frequency (LF) spectral analysis or ‘rhythm spectrum’ approach to the quantitative and comparison of speech rhythms is extended beyond syllable word ‘rhetorical rhythms’ in read-aloud narratives, a selection exploratory scenarios, with aim developing unified theory rhythms. Current methodologies field are first discussed, then choice data motivated modulation-theoretic rhythm spectrum s...

This article provides an overview of further methods for producing hybrid natural-synthetic spectra with adaptive frequency modulation (AdFM). It focuses on three different techniques for the generation of asymmetric spectra based on single-sideband FM, asymmetric FM and Split-sideband synthesis. The first two techniques are applied to the variable delay line implementation of AdFM, whereas the...