Iberian Orca Whale Boat Attacks: The Acoustic Intensity is a Function of Speed, Regardless of Motor.

The Acoustic Intensity of the Boat is a Function of Speed, Regardless of Motor.

Table of Contents

Tl;dr

Acoustic emission intensity of an unmotored sailboat will equal that of a motored boat at ~12 Knots. At ~15 Knots, the sailboat will be ~2x ‘louder’. The intensity increases exponentially with speed

At what speed does an unmotored sailboat become louder than a motored boat (all things equal)?

We can roughly approximate the speed at which a sailboat traveling with no motor will emit structual borne noise (SBN) that is greater than or equal to the point where Hydrodynamic Turbulence Noise (HNT) from sailing equals Structural Borne Noise (SBN) from the engine.

SBN Power (PSBN): Fixed, high intensity constant set by engine RPM. Dominates at low speeds.
HNT Power (PHNT): Noise from water flow. Power increases exponentially with velocity (V).

Read my other Orca speculations

15 Knots is ~2x the ‘noise’ of 12 Knots.
19 Knots is ~ 4x the ‘noise’ of 12 Knots.

See the main data analysis and ideas…

on this page

Use the short URL for this page: https://craighordlow.com/go/7nxc

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