#### Cardioid equation

## What is a cardioid curve?

The cardioid, a name first used by de Castillon in a paper in the Philosophical Transactions of the Royal Societyin 1741, is a curve that is the locus of a point on the circumference of circle rolling round the circumference of a circle of equal radius. Of course the name means ‘heart-shaped’.

## Why is a cardioid called a cardioid?

A cardioid (from the Greek καρδία “heart”) is a plane curve traced by a point on the perimeter of a circle that is rolling around a fixed circle of the same radius. Named for its heart-like form, it is shaped more like the outline of the cross section of a round apple without the stalk.

## How do you find the equation of a Limacon?

Equations of the form r = a + b sin θ, a – b sin θ, a + b cos θ, and a – b cos θ will produce limacons. Lets examine what happens for various values of a and b. When the value of a is less than the value of b, the graph is a limacon with and inner loop.

## What is the difference between cardioid and omnidirectional?

What is the difference between an Omnidirectional versus Cardioid Lavalier Microphone? An omnidirectional (omni directional or omni-directional) microphone (such as the ME 2) microphone has a spherical pickup pattern. A cardioid microphone (like the ME 4) is a narrower pick up pattern (more up and down than spherical).

## What does cardioid mean?

: a heart-shaped curve that is traced by a point on the circumference of a circle rolling completely around an equal fixed circle and has an equation in one of the forms ρ = a(1 ± cos θ) or ρ = a(1 ± sin θ) in polar coordinates.

## What is the difference between cardioid and supercardioid?

Supercardioid. A supercardioid mic has a tighter pickup angle than a cardioid, but unlike the cardioid, it offers more side rejection. It is, however, slightly sensitive to sound sources that are directly behind the mic.

## What is a cardioid polar pattern?

Cardioid (kar-dee-oid) is the most common directional polar pattern, with the highest sensitivity to sound coming in from directly in front of the microphone capsule (0º), practically no sensitivity to sound coming directly from behind (180º), and a reduced sensitivity to sound coming in from the sides (90º/270º).

## What is a cardioid mic?

The most common unidirectional microphone is a cardioid microphone, so named because the sensitivity pattern is “heart-shaped”, i.e. a cardioid. The cardioid response reduces pickup from the side and rear, helping to avoid feedback from the monitors.

## What is polar equation?

Polar Equations A polar equation is any equation that describes a relation between r r r and θ theta θ, where r r r represents the distance from the pole (origin) to a point on a curve, and θ theta θ represents the counterclockwise angle made by a point on a curve, the pole, and the positive x x x-axis.

## What does a Limacon look like?

Limaçon curves look like circles. They have various types depending on the values in their equations. In the image below, for example, the types of limaçon curves are: dimpled, cardioid, and looped (respectively).

## How do you sketch a curve?

More details can be found at AP Calculus Exam Review: Analysis of Graphs, for example.Determine the Domain and Range. Find the y-Intercept. Find the x-Intercept(s) Look for Symmetry. Find any Vertical Asymptote(s) Find Horizontal and/or Oblique Asymptote(s) Determine the Intervals of Increase and Decrease.