In the physical sciences, the term spectrum was introduced first into optics by Isaac Newton in the 17th century, referring to the range of colors observed...

According to Fourier analysis, any physical signal can be decomposed into a number of discrete frequencies, or a spectrum of frequencies over a continuous...

A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument. The primary use is to...

of Natural and Mathematical Sciences, Volume 1, Springer Science & Business Media - 2009, pages 4527-4530 "Spread Spectrum Clocking". Microsemi. Item Media...

is a weaker or stronger region in an otherwise uniform and continuous spectrum. It may result from emission or absorption of light in a narrow frequency...

Spectral bands are regions of a given spectrum, having a specific range of wavelengths or frequencies. Most often, it refers to electromagnetic bands,...

a "physical science", together is called the "physical sciences". Physical science can be described as all of the following: A branch of science (a systematic...

for this reason that the ultra low frequency band of the electromagnetic spectrum between 300 and 3000 Hz is also referred to as voice frequency, being the...

A spectrogram is a visual representation of the spectrum of frequencies of a signal as it varies with time. When applied to an audio signal, spectrograms...

power spectrum, as opposed to the flat spectrum of white noise. A high spectral flatness (approaching 1.0 for white noise) indicates that the spectrum has...

for example, a band-pass filter, a communication channel, or a signal spectrum. Baseband bandwidth is equal to the upper cutoff frequency of a low-pass...

S(f), often referred to as a frequency spectrum. Any linear time-invariant operation on s(t) produces a new spectrum of the form H(f)•S(f), which changes...

half (at most −3 dB). The FWHM method may be difficult to apply when the spectrum has a complex shape. Another method of specifying spectral width is a special...

the use of a spectrometer for chemical analysis. In the physical sciences, the term spectrum was introduced first into optics by Isaac Newton in the 17th...

A frequency comb or spectral comb is a spectrum made of discrete and regularly spaced spectral lines. In optics, a frequency comb can be generated by certain...

ear identifies it as the specific pitch of the musical tone [harmonic spectrum].... The individual partials are not heard separately but are blended together...

philosopher Electronic tuner – Device used to tune musical instruments Formant – Spectrum of phonetic resonance in speech production Fourier series – Decomposition...

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons...

sinusoidal shape into a more complex shape. When considered as part of a whole spectrum, a pure tone may also be called a spectral component. In clinical audiology...

the number of components and seek to estimate the whole generating spectrum. Spectrum analysis, also referred to as frequency domain analysis or spectral...

The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths...

antibiotics, extended-spectrum antibiotics and narrow-spectrum antibiotics based on their spectrum of activity. Detailedly, broad-spectrum antibiotics can kill...

particularities, let f {\displaystyle f} be a square-integrable function of physical space, and let H {\displaystyle {\mathcal {H}}} represent Fourier transformation...

The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate...

Autism, also known as autism spectrum disorder (ASD), is a neurodevelopmental condition characterized by differences or difficulties in social communication...

IEEE Spectrum. 4 (7): 166–7. doi:10.1109/MSPEC.1967.5215873. Milford, F. J. (1967). "Mathematical Methods in the Physical Sciences". Science. 155 (3769):...

The ZX Spectrum (UK: /zɛd ɛks/) is an 8-bit home computer developed and marketed by Sinclair Research. The Spectrum played a pivotal role in the history...

warfare. Full spectrum dominance includes the physical battlespace; air, surface and sub-surface as well as the electromagnetic spectrum and information...

In the physical sciences and in telecommunication, the term frequency shift may refer to: Any change in frequency A Doppler shift In facsimile, a frequency...

Modern science is typically divided into two – or three – major branches: the natural sciences, which study the physical world, and the social sciences, which...