Acoustical Science and Technology
Online ISSN : 1347-5177
Print ISSN : 1346-3969
ISSN-L : 0369-4232
Acoustic characteristics of nonwood baseball bats following revised Japanese Product Standards (Safe Goods (SG) Standards)
Mari UedaKohei NaitoHiroshi TanakaTakahiro Miura
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JOURNAL OPEN ACCESS Advance online publication

Article ID: e25.13

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Abstract

In this study, we measured the acoustic characteristics of nonwood baseball bats modified according to the Revised Japanese Product Standards (hereafter, Safe Goods (SG) Standards) enforced in 2024. New standard bats showed peak frequencies approximately 500 Hz higher than previous models. During Spring Koshien 2024, players reported differences in bat sound and ball travel distance, with the onomatopoeic description changing from “kakkin” to “kyu-in” following the revision, according to various media. The results of acoustic measurements conducted in compliance with the SG Standards confirm the observations of the players, indicating a tonal shift in the bats after the SG Standards were revised.

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© 2025 by The Acoustical Society of Japan

This article is licensed under a Creative Commons [Attribution-NoDerivatives 4.0 International] license.
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