Use this calculation for a first-order acoustics estimate when the stated geometry, propagation model, averaging convention, reference quantity, and SI units match the measurement or design problem.

Length Meters

A finite measured or assumed value greater than or equal to 0, expressed in m.

Target Hertz

A finite measured or assumed value greater than or equal to 0, expressed in Hz.

Linear Density Kg Per Meter

A finite measured or assumed value greater than or equal to 0, expressed in kg/m.

The implemented rule is: Tension needed for an ideal stretched string to reach a target fundamental frequency.^[1]

Tension Newtons

The calculated tension newtons, expressed in N.

This is an idealized calculation rather than a complete acoustic simulation or measurement. Reflections, boundary conditions, directivity, damping, frequency dependence, near-field behavior, background noise, transducer response, temperature, humidity, and geometry can change a real result.

Confirm important results with calibrated measurements or a model that includes the actual geometry, materials, boundaries, source directivity, and frequency-dependent losses. Preserve the reference quantity and weighting whenever a result is expressed in decibels.

• Vibrating String Fundamental

  Ideal stretched-string fundamental frequency from length, tension, and mass per unit length.

• Absorption Required For Target Rt

  Metric Sabine equivalent absorption area required for a target RT60: 0.161V/T.

• Acoustic Impedance Medium

  Characteristic specific acoustic impedance rho*c for a uniform medium.