Featured Research

from universities, journals, and other organizations

Taking the bite out of baseball bats

Date:
October 18, 2012
Source:
Acoustical Society of America (ASA)
Summary:
Miss hitting the "sweet spot" on a baseball bat and the resulting vibrations can zing your hands. Bat companies have tried for decades to reduce these painful shocks with limited success. But acoustics researcher Daniel Russell has figured out that bat vibrations between 600 and 700 hertz (Hz) cause the most pain and that specifically tuned vibration absorbers are the best at combating the sting.

Baseball player hitting a ball.
Credit: Tom Wang / Fotolia

Miss hitting the "sweet spot" on a baseball bat and the resulting vibrations can zing your hands. Bat companies have tried for decades to reduce these painful shocks with limited success. But Daniel Russell, a professor in the graduate program in acoustics at Pennsylvania State University in University Park, has figured out that bat vibrations between 600 and 700 hertz (Hz) cause the most pain and that specifically tuned vibration absorbers are the best at combatting the sting.

He will present the results of his damping technique comparisons at the 164th meeting of the Acoustical Society of America (ASA), held from Oct. 22 -- 26 in Kansas City, Missouri.

Human hands are sensitive to vibration frequencies between 200 Hz and 700 Hz, Russell says. When a ball impacts a baseball bat, two of the resulting bat vibration frequencies fall within that range. Previous damping techniques eliminated oscillations around 200 Hz, which causes pain in whichever hand is lowest on the bat. But after consulting baseball players, Russell learned that the most painful sensations occur in the top hand, where vibration frequencies between 600 and 700 Hz reside.

High-speed video analysis showed that these vibrations are so violent, "the hands lose contact with the bat during a swing," says Russell. "The fingers [and thumb] are being flung away from the bat because of the vibration." Foam fillings in an aluminum bat's handle can dampen these vibrations but do not eliminate them. So Russell worked with baseball bat manufacturer Marucci Sports to tune a vibration absorber that cancels out some of these painful oscillations.

The result is a mass-spring device nestled in the baseball bat's knob that quickly eliminates the bending pattern, or vibration, responsible for the bat's more painful sting. These absorbers must be specifically tuned, since the painful vibration frequencies vary depending on a bat's length.

The vibration absorbers Russell helped calibrate have been used in commercially available bats since 2010, and so far the response from players and consumers has been very encouraging, he notes.


Story Source:

The above story is based on materials provided by Acoustical Society of America (ASA). Note: Materials may be edited for content and length.


Cite This Page:

Acoustical Society of America (ASA). "Taking the bite out of baseball bats." ScienceDaily. ScienceDaily, 18 October 2012. <www.sciencedaily.com/releases/2012/10/121018102954.htm>.
Acoustical Society of America (ASA). (2012, October 18). Taking the bite out of baseball bats. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2012/10/121018102954.htm
Acoustical Society of America (ASA). "Taking the bite out of baseball bats." ScienceDaily. www.sciencedaily.com/releases/2012/10/121018102954.htm (accessed July 31, 2014).

Share This




More Matter & Energy News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Britain Testing Driverless Cars on Roadways

Britain Testing Driverless Cars on Roadways

AP (July 30, 2014) British officials said on Wednesday that driverless cars will be tested on roads in as many as three cities in a trial program set to begin in January. Officials said the tests will last up to three years. (July 30) Video provided by AP
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
Smartphone Powered Paper Plane Debuts at Airshow

Smartphone Powered Paper Plane Debuts at Airshow

AP (July 30, 2014) Smartphone powered paper airplane that was popular on crowdfunding website KickStarter makes its debut at Wisconsin airshow (July 30) Video provided by AP
Powered by NewsLook.com
U.K. To Allow Driverless Cars On Public Roads

U.K. To Allow Driverless Cars On Public Roads

Newsy (July 30, 2014) Driverless cars could soon become a staple on U.K. city streets, as they're set to be introduced to a few cities in 2015. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins