1. The response properties of single cells in monkey striate cortex were examined using moving bars, square-wave gratings, and sine-wave gratings. 2. The moving of cells studied were not selective for bar width or for the spatial frequency of square-wave gratings. 3. Most cells responded selectively to the spatial frequency of the sine-wave gratings. 4. The spatial frequency of the sine-wave gr...

ISIS, for ‘Intra-Samplar Interpolating Sinusoids’, is a means of mathematically interpolating sine wave segments between the samples of a sound wave recording (the word “sample” is here used as in “sample rate”). The sound wave is thus representable as a sequence of sine-tone pitches in extremely small time windows in the microsecond domain, rendering the wave audible as a rapid sine-tone ‘melo...

Rectified diffusion is a mechanism by which a strain wave can rapidly pump volatiles into a bubble and therefore increase the pressure in a closed syste~. The dynamic strain of either distant regional tectonic earthquakes or local volcanic tremor can be translated to static strain inside a magma chamber via this pro·cess. We formulate a theory appropriate to the conditions of a magma chamber an...

Abstmt-A new algorithm is presented for adaptive notch filtering and parametric spectral estimation of multiple narrow-band or sine wave signals in an additive broad-band process. The algorithm is of recursive prediction error (RPE) form and uses a special constrained model of infinite impulse response (IIR) with a minimal number of parameters. The convergent fdter is characterized by highly na...

Recent findings suggest that development changes the ability to comprehend degraded speech. Preschool children showed greater difficulties perceiving noise-vocoded speech (a signal that integrates amplitude over broad frequency bands) than sine-wave speech (which maintains the spectral peaks without the spectrum envelope). In contrast, 27-month-old children in the present study could recognize ...

In this paper we present a digital generator which produces sine-wave signals with variable frequency. The shape of the signal is stored in memory. The modification of the frequency is achieved by changing the number of samples used to generate a period. The digital circuitry of the generator is implemented using a field programmable gate array (FPGA) and a microcontroller. Experimentally we ha...

Sine-wave speech (SWS) is a three-tone replica of speech, conventionally created by matching each constituent sinusoid in amplitude and frequency with the corresponding vocal tract resonance (formants). We propose an alternative technique of starting from a high-quality multicomponent sinusoidal representation, then decimating this model to only three components per frame. In contrast to SWS, t...

Several researchers have linked under-specified phonological representations to dyslexia. In order to investigate the nature of the dyslexic's phonological representations, adult dyslexics with severe phonological decoding deficits listened to sine-wave speech and reported what was said. Results show no difference in perceptual performance between the dyslexics and the controls. Possible under-...

Active capillary dielectric barrier discharge ionization (DBDI) is emerging as a compact, low-cost, and robust method to form intact ions of small molecules for detection in near real time by portable mass spectrometers. Here, we demonstrate that by using a 10 kHz, ~2.5 kVp-p high-voltage square-wave alternating current plasma, active capillary DBDI can consume less than 1 μW of power. In contr...