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sinusoid

sinusoid

9.5
A smooth repeating wave like a sine curve used to show oscillations
  • noun
  • /ˈsaɪnəˌsɔɪd/
  • Specialized
translation icon : sinusoide
  • A sinusoid represents the mathematical function y = sin x, forming a smooth wave pattern.

Just thinking about sinusoids throughout the converter, you don't always get that.

Examples

  • This fluctuation is not sinusoidal but can be represented as a superposition of orthogonal sinusoids at periods of 7 and 3.5 days.

    Academic text (1995)
  • Further investigation is warranted, in which researchers compare the effects of envelope DRs on speech intelligibility between noise-vocoded and sinusoid-vocoded speech.

    Academic text (2013)
  • Well, the fast sinusoid here is called the carrier.

  • The peaks due to the two sinusoids are quite apparent, and there is essentially no distortion.

    Academic text (1990)
  • The signal was a digitally generated 500-Hz sinusoid using a sampling frequency of 25 kHz.

    Academic text (1992)
  • For our data (2 years), the periodogram fit sinusoids whose periods were integer fractions of 735 days.

    Academic text (1995)
  • The six chords are composed of the following sinusoids with the respective crest factors (CF): PREFORMATTED TABLE

    Academic text (1993)
  • There are a large number of distortion products generated by the clipping, with major peaks found in the vicinity of the third and fifth harmonics of the excitation sinusoids.

    Academic text (1990)
  • To this end, the response of the instrument is measured for an excitation consisting of the 60 dB SPL-shaped noise combined with an 80 dB SPL swept sinusoid.

    Academic text (1990)
  • While it is obvious that the envelope fluctuations of speech are not reproduced, this test signal does come closer to a speech-like stimulus than the single swept sinusoid specified in the ANSI S3.22 standard (1).

    Academic text (1990)

Synonyms

sine wave
vssinusoid
  • Specialized
3 5.1

A smooth repeating wave that goes up and down in a regular curved line

is the same mathematical curve but emphasises abstract graph over physical use
sine curve
vssinusoid
  • Specialized
1 6.8

A smooth wavy graph that repeats regularly, for example y = sin x

is the identical graph often named by a different technical word

Surface Forms

sinusoid singular
sinusoids plural

Morphology

sinusoid = sinus (semi-transparent) = sinus + oid

The suffix '-oid' means 'resembling', but the base form 'sinus' (and its relation to the trigonometric 'sine') may not be immediately obvious to general learners.

Etymology

Sinusoid comes from the math word sine, which traces back to Latin sinus 'curve' or 'fold', plus the ending -oid meaning 'like'. So a sinusoid is 'like a sine' — a smooth, wave-shaped curve such as y = sin x.