Acoustic Beat Interference cos(ω₁x) + cos(ω₂x) & Modulation Envelope

Superposition of two close frequencies produces rapid carrier waves modulated by slow beat envelope 2·cos(Δω·x/2).

Expressions & Parameters

Primary Function f₁(x)

Comparison Curve f₂(x)

Plot Tangent Line at x₀ Shade Integral [a, b]

Live Parameter Sliders (a, b, c)

a1.00

b1.00

c0.00

Interactive Coordinate Plane (Drag to Pan · Wheel to Zoom)

(0.000, 0.000)

Pre-Computed Analytical Curve Reference

Primary Equationy = cos(a*x) + cos(b*x)

Symbolic Derivative dy/dx-sin(a*x)*a + -sin(b*x)*b

Canonical Viewportx ∈ [-8, 8], y ∈ [-2.4, 2.4]

Related Interactive Curves

Physics & Vibrations

Damped Harmonic Oscillator y = e^(−ax)·cos(bx) — Envelope & Phase Decay

Models underdamped mechanical springs and RLC circuits where exponential envelope e^(−ax) bounds rapid cosine oscillations.

y = exp(-a*x)*cos(b*x)

Probability & Statistics

Gaussian Normal Bell Curve f(x) = (1 / σ√2π)·e^(−(x−μ)²/2σ²)

Normalized probability density function with total area equal to 1, peak at x = μ, and inflection points at x = μ ± σ.

y = exp(-(x - c)^2 / (2*a^2)) / (a*sqrt(2*pi))

Machine Learning & Biology

Logistic Sigmoid Curve S(x) = L / (1 + e^(−k(x − x₀)))

Bounded S-shaped activation and population carrying-capacity curve with inflection symmetry at y = L/2.

y = a / (1 + exp(-b*(x - c)))

Signal Processing & Optics

Normalized Sinc Function sin(ax)/(ax) & Fraunhofer Diffraction Intensity

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y = sinc(a*x)

Classical Algebraic Curves

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y = 8*a^3 / (x^2 + 4*a^2)

Structural Mechanics

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y = a*cosh(x/a)

Mathematical Reference & Frequently Asked Questions

How can I modify the parameters of Acoustic Beat Interference cos(ω₁x) + cos(ω₂x) & Modulation Envelope?

Drag sliders a, b, and c in the expression sidebar or edit the formula directly to observe real-time shifts in amplitude, frequency, roots, and extrema.