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.

Related Articles


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 March 30, 2015 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 March 30, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Monday, March 30, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Inspectors Found Faulty Work Before NYC Blast

Inspectors Found Faulty Work Before NYC Blast

AP (Mar. 27, 2015) An hour before an apparent gas explosion sent flames soaring and debris flying at a Manhattan apartment building, injuring 19 people, utility company inspectors decided the work being done there was faulty. (March 27) Video provided by AP
Powered by NewsLook.com
Facebook Building Plane-Sized Drones For Global Internet

Facebook Building Plane-Sized Drones For Global Internet

Newsy (Mar. 27, 2015) Facebook on Thursday revealed more details about its Internet-connected drone project. The drone is bigger than a 737, but lighter than a car. Video provided by Newsy
Powered by NewsLook.com
Robot Returns from International Space Station and Sets Two Guinness World Records

Robot Returns from International Space Station and Sets Two Guinness World Records

Reuters - Light News Video Online (Mar. 27, 2015) The companion robot "Kirobo" returns to earth from the International Space Station and sets two Guinness World Records. Sharon Reich reports. Video provided by Reuters
Powered by NewsLook.com
Residents Witness Building Explosion, Collapse

Residents Witness Building Explosion, Collapse

AP (Mar. 26, 2015) Witnesses recount the sites and sounds of a massive explosion and subsequent building collapse in the heart of Manhattan&apos;s trendy East Village on Thursday. (March 26) Video provided by AP
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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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