_verified_ — Martin J King Mathcad Worksheets

This is the flagship worksheet suite. It allows users to input Thiele-Small driver parameters, define the line length, and specify the cross-sectional areas at the start ( S0cap S sub 0 ) and end ( SLcap S sub cap L

Hidden in the last worksheet, buried under a layer of matrix math, was a single, uncommented cell. It wasn’t part of any formula. It was a note, written in the old Mathcad text box:

How specific amounts of polyester fiber or long-hair wool stuffing attenuate higher-frequency internal reflections. martin j king mathcad worksheets

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For professional engineers, advanced scripts in AkAbak or modern finite element analysis (FEA) software use the same underlying acoustic physics that King popularized in the DIY community. This is the flagship worksheet suite

designs, these models eventually expanded to simulate nearly any enclosure type, from open baffles to complex front-loaded horns. Key features of these worksheets included: Acoustic and Electrical Circuits

Allowed the modeling of dipole speakers, helping designers calculate the exact baffle step roll-off and floor-reflection cancellations. It was a note, written in the old

Back-loaded horns are highly popular among single-driver, full-range speaker enthusiasts. King’s BLH worksheet models the horn profile (exponential, hyperbolic, or conical) and simulates how the rear radiation of the driver couples with the room. It accurately predicts the mid-bass dip common in poorly designed horns, allowing the designer to fix it in software first. 3. The Open Baffle (OB) Worksheets