# cardioid

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Related to cardioid: cardioid microphone
cardioid
The parametric equations of this cardioid are
x = -a cos θ (1 - cos θ),
y = a sin θ (1 - cos θ).

## car·di·oid

(kär′dē-oid′)
n.
A heart-shaped plane curve, the locus of a fixed point on a circle that rolls on the circumference of another circle with the same radius.

## cardioid

(ˈkɑːdɪˌɔɪd)
n
(Mathematics) a heart-shaped curve generated by a fixed point on a circle as it rolls around another fixed circle of equal radius, a. Equation: r = a(1 – cos φ), where r is the radius vector and φ is the polar angle

## car•di•oid

(ˈkɑr diˌɔɪd)

n.
a heart-shaped curve traced by a point on a circle that rolls without slipping on another equal circle. Equation: r = a (1−cosA).
[1745–55; < Greek kardioeidḗs heart-shaped]
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 cardioid - an epicycloid in which the rolling circle equals the fixed circleepicycloid - a line generated by a point on a circle rolling around another circle
Translations

## cardioid

[ˈkɑːdɪˌɔɪd] n (Math) → cardioide f
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References in periodicals archive ?
By selecting one of the four modes, the microphone will pick up sound from different areas, so the cardioid function will take sound directly in front of it, while the omnidirectional mode records equally from all directions.
There are also two Neumann heads in cardioid and super-cardioid patterns.
Modulation Mode-Fm F3e , Microphone Element- Dynamic Cardioid Dynamic Range- 100 Db, Spurious Emission- 45Db, Maximum Deviation-A _ 25 Khj, Frequency Responce-50-15000 Hz Current Consumption- 60 Ma, Battery Life- 6-8 Hrs.
In addition to the placement of the microphone being important, the orientation of the microphones cardioid pickup pattern can affect the ASR system.
The mic boom is flexible and has a dynamic noise-cancelling cardioid microphone optimized for voice communications and outstanding audio quality.
Hand-selected for unbeatable quality and value for money, orders are now being taken for Reloops newRMX-90 DVS Club Mixer for Serato DJ with 8 in/8 out audio interface, the latest QSC K Cardioid Subwoofer Dual 12-inch Active Subwoofer and the long-awaited QSC K Cardioid Subwoofer Dual 12-inch Active Subwoofer.
Using cardioid condensers alongside Logic, he recorded and mixed the tracks himself in order to produce the sounds as he imagined them.
Ensuring that all local presenter microphones are handheld-style (whether on stands or not)--with a more selective cardioid polar pattern--will virtually eliminate yet another potential audio feedback source.
In addition, Kraftwerk's team installed a number of Molton curtains and expanded the PA system with special cardioid bass-arrays for an even better sonic experience.
At time around t = 35 ms, the wedge has almost completely traversed the cavity and is still affecting the splash asymmetry, and a cardioid shape is seen in the top view, with the wedge fully bisecting the cavity.
Helping with all your heart: the effect of cardioid dishes on tipping behavior.
The recordings used in this research were carried out by a speech therapist phonoaudiologist, a child at a time, in an acoustic booth set up in the Municipal School (EMEI), with a digital recorder (Marantz, model PMD 670), coupled to a cardioid dynamic vocal microphone (SHURE, model 8800).

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