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.

Frequency Hertz

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

The implemented rule is: Angular frequency in radians per second from frequency in hertz.^[1]

Radians Per Second

The calculated radians per second, expressed in rad/s.

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.

• Frequency From Wavelength

  Acoustic frequency from wave speed and positive wavelength.

• Scale Model One To Ten Times Ten Frequency Rule

  Frequency required in a geometrically reduced 1:N acoustic scale model to represent a full-scale frequency.

• Wavelength From Frequency

  Acoustic wavelength in metres from wave speed and positive frequency.