Measure your serve speed...

Discussion in 'Tennis Tips/Instruction' started by gzhpcu, Jan 8, 2010.

  1. gzhpcu

    gzhpcu Professional

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    I have an iPhone, and just found this application, which acts as a radar gun.
    http://speedhero.com/
    Will try it out next week. This would be a real low cost alternative to a radar gun...

    Anybody test it yet?
     
    #1
  2. ManuGinobili

    ManuGinobili Hall of Fame

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    wow that looks money... and is a lot of money!! Can't find radar guns in my country let alone tennis clubs in the area, so this will be an useful tool if it really works
     
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  3. aphex

    aphex Banned

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    apparently it records the sound your serve makes:shock::shock:
    no way that can be accurate...
     
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  4. Jaewonnie

    Jaewonnie Professional

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    hmm...so a heavy spinned floaty serve might register a high speed?
     
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  5. Mig1NC

    Mig1NC Professional

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    Not compatible with WinMo, iPhone, or Linux phones?
     
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  6. gzhpcu

    gzhpcu Professional

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    The way it works (I took a look at it without trying it out yet), is that you have to go 11,9 meters from a wall or fence, then serve. It knows the distance, so it registers the sound from the impact of the serve and then the sound from the impact on the backdrop. Should work well...
     
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  7. aphex

    aphex Banned

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    yep, reread it...you're right....i'm probably gonna download it...
    we don't have a wall at the club-i hope the sound from the fence works...
     
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  8. goran_ace

    goran_ace Hall of Fame

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    If that's how it works then don't even bother buying the app. Not hard to figure out how to do that yourself for free.
     
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  9. gzhpcu

    gzhpcu Professional

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    And how would you do it in an accurate fashion?
     
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  10. Bashi

    Bashi Rookie

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    im assuming you can measure sound to the tenth of a decibel in your head?
     
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  11. Danstevens

    Danstevens Semi-Pro

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    I might give it a go, it isn't too expensive and if it works with any sort of accuracy, it might be a fun thing to play with occasionally.

    :shock: Bashi, you seem to be saying that like you can't :confused: :wink:
     
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  12. 5263

    5263 G.O.A.T.

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    I don't think this is about measuring decibels, but measuring the time interval between sounds instead, correct?
     
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  13. Danstevens

    Danstevens Semi-Pro

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    That's how it came across to me. Of course, knowing the distance covered and the amount of time between the sounds, it would be relatively simple to calculate the average speed of the ball between contact with the racket and contact with the wall/whatever else is in the way.
     
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  14. tennisdad65

    tennisdad65 Hall of Fame

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    very smart idea :)
    I think it can be fairly accurate if you place the phone exactly midway between serve contact point and wall. I would love to see someone with a speedtrac radar gun also use this and confirm how well this works.
     
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  15. marosmith

    marosmith Professional

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    Instead of someone using it and seeing if it's accurate, let's argue about it and talk about it for a few pages.
     
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  16. Xenakis

    Xenakis Hall of Fame

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    I've just bought and dl'd it.

    The app works fine, easy to dl and install. Won't be able to test it until either the snow melts (not looking that likely atm) or I play indoors (Tuesday possibly)

    Will have to remember to take a tape measure with me to the court as the distance has to be exact for this to work.

    A bit of a whimsy really, I can measure serve speed by videoing my serve and counting frames. Also you don't really need to know how fast your serve is, if it looks really fast and your opponent has difficulty returning it, then it's fast enough.

    I'll report back in a few days.
     
    #16
  17. Rock Strongo

    Rock Strongo Legend

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    I just bought the app aswell. Tried it in my small room by bouncing a ball against the wall and got about 140 mph:p But i'll try it for real at tomorrow's practice and will report back with results.
     
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  18. Bashi

    Bashi Rookie

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    but if that were true, you'd have to hit the ball at exactly the same angle every time. if you hit at a few degrees sharper downward, the ball would take longer to reach the wall, skewing your result significantly
     
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  19. J011yroger

    J011yroger G.O.A.T.

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    And you call yourself a man. . .

    J
     
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  20. benasp

    benasp Semi-Pro

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    don't waste money on that.

    1- go take some math course
    2- record yourself serving with you iphone, you can say where it landed after each serve to be very accurate
    3- import to you computer and download audacity
    4- select the area between the serve sound and the bounce sound, the time will be written very accurately in the bottom of the screen
    5- Do some math and save money!
     
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