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Author Topic: Most accurate db app?  (Read 20604 times)

Greg Bartusch

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Most accurate db app?
« on: May 09, 2013, 05:47:45 pm »

I have a iPhone and a iPad. What  decibel meter app would you say is the most accurate? I've got 4 different db apps on my iPad and I'm not sure which one to go by. They all read differently.
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Rob Burgess

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Re: Most accurate db app?
« Reply #1 on: May 09, 2013, 06:35:35 pm »

I have a iPhone and a iPad. What  decibel meter app would you say is the most accurate? I've got 4 different db apps on my iPad and I'm not sure which one to go by. They all read differently.

     I have the Sound Tools app on my phone and discovered last week at a show that it's ~5dbC off.  But you can go into settings and adjust it.  If you have access to a reasonably accurate meter it's pretty easy to fix.

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Tim McCulloch

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Re: Most accurate db app?
« Reply #2 on: May 10, 2013, 10:57:43 am »

I have a iPhone and a iPad. What  decibel meter app would you say is the most accurate? I've got 4 different db apps on my iPad and I'm not sure which one to go by. They all read differently.

That should your indication to buy a stand-alone meter.

Frankly, screw the iphone, the Androids, etc.  The microphones in them have various frequency response and dynamics-altering circuitry and algorithms that are not 100% defeatable for measurement purposes.

Your $600 phone is an entertainment delivery device and does a fairly good job of such.  That it can be kludged into performing other tasks is useful only if you can accept whatever limitations the kluge requires.

Be a hero, spend $80 on a meter.  Or be a real hero and spend as much money on tools for your profession as you did for your entertainment & communication.
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Mark McFarlane

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Re: Most accurate db app?
« Reply #3 on: May 11, 2013, 10:16:45 am »

...
Be a hero, spend $80 on a meter.  Or be a real hero and spend as much money on tools for your profession as you did for your entertainment & communication.

I have a decade old Radio Shack analog meter.  Anyone have an idea as to how accurate they are?
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Mark McFarlane
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Randy Culpepper

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Most accurate db app?
« Reply #4 on: May 11, 2013, 10:55:56 am »

There's a device called a check mate cm-c200 that sends out a 1k tone at 94db and 114 db. It allows you to calibrate an spl meter to have a true reflection of what's happening as far as spl in a room.
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Doug Fowler

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Re: Most accurate db app?
« Reply #5 on: May 11, 2013, 11:23:30 am »

I have a decade old Radio Shack analog meter.  Anyone have an idea as to how accurate they are?

I have the old analog style RS meter.  I have checked it over the years with calibrated systems and it has always been "off" by less than 1 dB. 
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brian maddox

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Re: Most accurate db app?
« Reply #6 on: May 11, 2013, 11:30:10 am »

I have the old analog style RS meter.  I have checked it over the years with calibrated systems and it has always been "off" by less than 1 dB.

Yup.  Been using mine for about 20 years. Check it periodically and it's always within 1 dB + or -  .
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John Roberts {JR}

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Re: Most accurate db app?
« Reply #7 on: May 11, 2013, 12:01:36 pm »

A man with one meter knows his levels, a man with two meters never knows. :-)

JR
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Doug Fowler

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Re: Most accurate db app?
« Reply #8 on: May 11, 2013, 12:02:11 pm »

There's a device called a check mate cm-c200 that sends out a 1k tone at 94db and 114 db. It allows you to calibrate an spl meter to have a true reflection of what's happening as far as spl in a room.

I have this piece, it's a calibrator which fits over a measurement microphone.  You can't use it to calibrate anything else.
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Mark McFarlane

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Re: Most accurate db app?
« Reply #9 on: May 11, 2013, 01:18:03 pm »

I have the old analog style RS meter.  I have checked it over the years with calibrated systems and it has always been "off" by less than 1 dB.

Thanks Doug and Brian.  Does anyone think that an iPad app could be repeatable, within a given db range, calibrated to another know source?  Anyone done a series of side-by-side tests?
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Mark McFarlane
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ProSoundWeb Community

Re: Most accurate db app?
« Reply #9 on: May 11, 2013, 01:18:03 pm »


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