signal.NoiseGen.Function.generateSpectralNoise

dsp-collection / signal/NoiseGen / generateSpectralNoise

Function: generateSpectralNoise()

function generateSpectralNoise(specAmplitudes, n): Float64Array;

Defined in: signal/NoiseGen.ts:63

Low-level function to generate random noise with a specified amplitude spectrum.

The passed spectral amplitudes are combined with random phases and then transformed by an inverse FFT to produce a time-domain signal.

Parameters

specAmplitudes

ArrayLike<number>

An array of spectrum amplitudes (linear scale). The DC value at specAmplitudes[0] is normally set to 0. specAmplitudes[i] is the amplitude of FFT bin i, i.e. a sinusoid with period n / i samples.

n

number

The number of output samples to generate. Even values of n are faster than odd values; powers of 2 are fastest.

Returns

Float64Array

The generated noise signal.