voltage of sounds of mp3files












6












$begingroup$


What is the maximum voltage for common music files?
When playing back on a smartphone, if the volume of the smartphone is set to max, how much voltage does the electric signal of the voltage be sent to the earphones?






voltage sound







share|improve this question







New contributor




たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$








  • 6




    $begingroup$
    if you really think about what you asked, then you will realise that you asked the kind of question that is un-answerable .... you did not define the parameters of the music file contents ........ a similar un-answerable question is how loud is music?
    $endgroup$
    – jsotola
    15 hours ago






  • 1




    $begingroup$
    Perhaps this is a question about the electrical interface between an audio device and a headphone or earphone set rather than a question about sampled audio data.
    $endgroup$
    – Solomon Slow
    14 hours ago






  • 7




    $begingroup$
    The MP3 records sound intensity in a range between zero and maximum. The hardware playing the MP3 decides what "Maximum" means.
    $endgroup$
    – J...
    13 hours ago






  • 1




    $begingroup$
    It depends on the phone and the earphone impedance, but iPhone 6 produces a maximum of about 1V RMS according to this link: anandtech.com/show/8554/the-iphone-6-review/11
    $endgroup$
    – Ken Shirriff
    13 hours ago






  • 1




    $begingroup$
    42 is the answer to life the universe and everything... so I pick that.
    $endgroup$
    – UKMonkey
    6 hours ago
















6












$begingroup$


What is the maximum voltage for common music files?
When playing back on a smartphone, if the volume of the smartphone is set to max, how much voltage does the electric signal of the voltage be sent to the earphones?






voltage sound







share|improve this question







New contributor




たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$








  • 6




    $begingroup$
    if you really think about what you asked, then you will realise that you asked the kind of question that is un-answerable .... you did not define the parameters of the music file contents ........ a similar un-answerable question is how loud is music?
    $endgroup$
    – jsotola
    15 hours ago






  • 1




    $begingroup$
    Perhaps this is a question about the electrical interface between an audio device and a headphone or earphone set rather than a question about sampled audio data.
    $endgroup$
    – Solomon Slow
    14 hours ago






  • 7




    $begingroup$
    The MP3 records sound intensity in a range between zero and maximum. The hardware playing the MP3 decides what "Maximum" means.
    $endgroup$
    – J...
    13 hours ago






  • 1




    $begingroup$
    It depends on the phone and the earphone impedance, but iPhone 6 produces a maximum of about 1V RMS according to this link: anandtech.com/show/8554/the-iphone-6-review/11
    $endgroup$
    – Ken Shirriff
    13 hours ago






  • 1




    $begingroup$
    42 is the answer to life the universe and everything... so I pick that.
    $endgroup$
    – UKMonkey
    6 hours ago














6












6








6





$begingroup$


What is the maximum voltage for common music files?
When playing back on a smartphone, if the volume of the smartphone is set to max, how much voltage does the electric signal of the voltage be sent to the earphones?






voltage sound







share|improve this question







New contributor




たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




What is the maximum voltage for common music files?
When playing back on a smartphone, if the volume of the smartphone is set to max, how much voltage does the electric signal of the voltage be sent to the earphones?






voltage sound




voltage sound






share|improve this question







New contributor




たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question







New contributor




たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question






New contributor




たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked 15 hours ago









たくまいわきたくまいわき

313




313




New contributor




たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






たくまいわき is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 6




    $begingroup$
    if you really think about what you asked, then you will realise that you asked the kind of question that is un-answerable .... you did not define the parameters of the music file contents ........ a similar un-answerable question is how loud is music?
    $endgroup$
    – jsotola
    15 hours ago






  • 1




    $begingroup$
    Perhaps this is a question about the electrical interface between an audio device and a headphone or earphone set rather than a question about sampled audio data.
    $endgroup$
    – Solomon Slow
    14 hours ago






  • 7




    $begingroup$
    The MP3 records sound intensity in a range between zero and maximum. The hardware playing the MP3 decides what "Maximum" means.
    $endgroup$
    – J...
    13 hours ago






  • 1




    $begingroup$
    It depends on the phone and the earphone impedance, but iPhone 6 produces a maximum of about 1V RMS according to this link: anandtech.com/show/8554/the-iphone-6-review/11
    $endgroup$
    – Ken Shirriff
    13 hours ago






  • 1




    $begingroup$
    42 is the answer to life the universe and everything... so I pick that.
    $endgroup$
    – UKMonkey
    6 hours ago














  • 6




    $begingroup$
    if you really think about what you asked, then you will realise that you asked the kind of question that is un-answerable .... you did not define the parameters of the music file contents ........ a similar un-answerable question is how loud is music?
    $endgroup$
    – jsotola
    15 hours ago






  • 1




    $begingroup$
    Perhaps this is a question about the electrical interface between an audio device and a headphone or earphone set rather than a question about sampled audio data.
    $endgroup$
    – Solomon Slow
    14 hours ago






  • 7




    $begingroup$
    The MP3 records sound intensity in a range between zero and maximum. The hardware playing the MP3 decides what "Maximum" means.
    $endgroup$
    – J...
    13 hours ago






  • 1




    $begingroup$
    It depends on the phone and the earphone impedance, but iPhone 6 produces a maximum of about 1V RMS according to this link: anandtech.com/show/8554/the-iphone-6-review/11
    $endgroup$
    – Ken Shirriff
    13 hours ago






  • 1




    $begingroup$
    42 is the answer to life the universe and everything... so I pick that.
    $endgroup$
    – UKMonkey
    6 hours ago








6




6




$begingroup$
if you really think about what you asked, then you will realise that you asked the kind of question that is un-answerable .... you did not define the parameters of the music file contents ........ a similar un-answerable question is how loud is music?
$endgroup$
– jsotola
15 hours ago




$begingroup$
if you really think about what you asked, then you will realise that you asked the kind of question that is un-answerable .... you did not define the parameters of the music file contents ........ a similar un-answerable question is how loud is music?
$endgroup$
– jsotola
15 hours ago




1




1




$begingroup$
Perhaps this is a question about the electrical interface between an audio device and a headphone or earphone set rather than a question about sampled audio data.
$endgroup$
– Solomon Slow
14 hours ago




$begingroup$
Perhaps this is a question about the electrical interface between an audio device and a headphone or earphone set rather than a question about sampled audio data.
$endgroup$
– Solomon Slow
14 hours ago




7




7




$begingroup$
The MP3 records sound intensity in a range between zero and maximum. The hardware playing the MP3 decides what "Maximum" means.
$endgroup$
– J...
13 hours ago




$begingroup$
The MP3 records sound intensity in a range between zero and maximum. The hardware playing the MP3 decides what "Maximum" means.
$endgroup$
– J...
13 hours ago




1




1




$begingroup$
It depends on the phone and the earphone impedance, but iPhone 6 produces a maximum of about 1V RMS according to this link: anandtech.com/show/8554/the-iphone-6-review/11
$endgroup$
– Ken Shirriff
13 hours ago




$begingroup$
It depends on the phone and the earphone impedance, but iPhone 6 produces a maximum of about 1V RMS according to this link: anandtech.com/show/8554/the-iphone-6-review/11
$endgroup$
– Ken Shirriff
13 hours ago




1




1




$begingroup$
42 is the answer to life the universe and everything... so I pick that.
$endgroup$
– UKMonkey
6 hours ago




$begingroup$
42 is the answer to life the universe and everything... so I pick that.
$endgroup$
– UKMonkey
6 hours ago










3 Answers
3






active

oldest

votes


















9












$begingroup$

It does not depend on the music file, but at the amplifier sending the music to a speaker, or to a headphone/earplug connector.



A music file only contains 'values', and mostly in a compressed form. After uncompressing, you get values which has a certain amount on bits per value (typically 16 or more).



A microcontroller can send these values to a speaker via an pre- and/or amplifier, which converts it into actual voltages. So it depends on the amount of amplification.



Also note that sending continuous 'max values' do not result in a loud sound, actually it would breaks the speaker (to prevent this, in the amplifier a so-called DC speaker protection is present). A wave is needed to let the speaker move outwards and inwards very fast, and this is done by sending changing values to the speaker.



If you want to measure, you can use an oscilloscope to measure the audio output while sending a sine wave with a maximum amplitude.






share|improve this answer











$endgroup$









  • 5




    $begingroup$
    Re, "...actually it breaks the speaker." If I can create a sound file that blows your speakers when you play it, the fault is not in my file. Your music player should at least be able to survive any sound file that you try to play.
    $endgroup$
    – Solomon Slow
    15 hours ago






  • 1




    $begingroup$
    @SolomonSlow Good point, I updated my answer (and learnt something myself from it).
    $endgroup$
    – Michel Keijzers
    15 hours ago










  • $begingroup$
    @SolomonSlow Some speakers won't be very happy if you play a mono-tone at a resonant frequency; And it happens quite often with sub woofer speakers; I'm sure you've heard some where the cone has been damaged. I agree the ideal is that the speaker should survive any input; but realistically if you find the right resonant frequency the damping of the speaker might not be sufficient to protect it.
    $endgroup$
    – UKMonkey
    5 hours ago



















2












$begingroup$

Normally it's limited by the cellphone battery voltage, which is about 3.7V. However there are other limits in play like the EU volume limit of 100dB - which is specified as SPL rather than a voltage.






share|improve this answer









$endgroup$





















    1












    $begingroup$

    These days a lot of DAC chips for consumer equipment use 2 Vrms standard.



    The supply voltage is largely irrelevant, as a lot of DAC chips also use internal charge pumps to boost up supply voltage and to generate negative supply voltage for the audio output stage, so they can drive DC coupled loads directly.






    share|improve this answer









    $endgroup$













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      3 Answers
      3






      active

      oldest

      votes








      3 Answers
      3






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      9












      $begingroup$

      It does not depend on the music file, but at the amplifier sending the music to a speaker, or to a headphone/earplug connector.



      A music file only contains 'values', and mostly in a compressed form. After uncompressing, you get values which has a certain amount on bits per value (typically 16 or more).



      A microcontroller can send these values to a speaker via an pre- and/or amplifier, which converts it into actual voltages. So it depends on the amount of amplification.



      Also note that sending continuous 'max values' do not result in a loud sound, actually it would breaks the speaker (to prevent this, in the amplifier a so-called DC speaker protection is present). A wave is needed to let the speaker move outwards and inwards very fast, and this is done by sending changing values to the speaker.



      If you want to measure, you can use an oscilloscope to measure the audio output while sending a sine wave with a maximum amplitude.






      share|improve this answer











      $endgroup$









      • 5




        $begingroup$
        Re, "...actually it breaks the speaker." If I can create a sound file that blows your speakers when you play it, the fault is not in my file. Your music player should at least be able to survive any sound file that you try to play.
        $endgroup$
        – Solomon Slow
        15 hours ago






      • 1




        $begingroup$
        @SolomonSlow Good point, I updated my answer (and learnt something myself from it).
        $endgroup$
        – Michel Keijzers
        15 hours ago










      • $begingroup$
        @SolomonSlow Some speakers won't be very happy if you play a mono-tone at a resonant frequency; And it happens quite often with sub woofer speakers; I'm sure you've heard some where the cone has been damaged. I agree the ideal is that the speaker should survive any input; but realistically if you find the right resonant frequency the damping of the speaker might not be sufficient to protect it.
        $endgroup$
        – UKMonkey
        5 hours ago
















      9












      $begingroup$

      It does not depend on the music file, but at the amplifier sending the music to a speaker, or to a headphone/earplug connector.



      A music file only contains 'values', and mostly in a compressed form. After uncompressing, you get values which has a certain amount on bits per value (typically 16 or more).



      A microcontroller can send these values to a speaker via an pre- and/or amplifier, which converts it into actual voltages. So it depends on the amount of amplification.



      Also note that sending continuous 'max values' do not result in a loud sound, actually it would breaks the speaker (to prevent this, in the amplifier a so-called DC speaker protection is present). A wave is needed to let the speaker move outwards and inwards very fast, and this is done by sending changing values to the speaker.



      If you want to measure, you can use an oscilloscope to measure the audio output while sending a sine wave with a maximum amplitude.






      share|improve this answer











      $endgroup$









      • 5




        $begingroup$
        Re, "...actually it breaks the speaker." If I can create a sound file that blows your speakers when you play it, the fault is not in my file. Your music player should at least be able to survive any sound file that you try to play.
        $endgroup$
        – Solomon Slow
        15 hours ago






      • 1




        $begingroup$
        @SolomonSlow Good point, I updated my answer (and learnt something myself from it).
        $endgroup$
        – Michel Keijzers
        15 hours ago










      • $begingroup$
        @SolomonSlow Some speakers won't be very happy if you play a mono-tone at a resonant frequency; And it happens quite often with sub woofer speakers; I'm sure you've heard some where the cone has been damaged. I agree the ideal is that the speaker should survive any input; but realistically if you find the right resonant frequency the damping of the speaker might not be sufficient to protect it.
        $endgroup$
        – UKMonkey
        5 hours ago














      9












      9








      9





      $begingroup$

      It does not depend on the music file, but at the amplifier sending the music to a speaker, or to a headphone/earplug connector.



      A music file only contains 'values', and mostly in a compressed form. After uncompressing, you get values which has a certain amount on bits per value (typically 16 or more).



      A microcontroller can send these values to a speaker via an pre- and/or amplifier, which converts it into actual voltages. So it depends on the amount of amplification.



      Also note that sending continuous 'max values' do not result in a loud sound, actually it would breaks the speaker (to prevent this, in the amplifier a so-called DC speaker protection is present). A wave is needed to let the speaker move outwards and inwards very fast, and this is done by sending changing values to the speaker.



      If you want to measure, you can use an oscilloscope to measure the audio output while sending a sine wave with a maximum amplitude.






      share|improve this answer











      $endgroup$



      It does not depend on the music file, but at the amplifier sending the music to a speaker, or to a headphone/earplug connector.



      A music file only contains 'values', and mostly in a compressed form. After uncompressing, you get values which has a certain amount on bits per value (typically 16 or more).



      A microcontroller can send these values to a speaker via an pre- and/or amplifier, which converts it into actual voltages. So it depends on the amount of amplification.



      Also note that sending continuous 'max values' do not result in a loud sound, actually it would breaks the speaker (to prevent this, in the amplifier a so-called DC speaker protection is present). A wave is needed to let the speaker move outwards and inwards very fast, and this is done by sending changing values to the speaker.



      If you want to measure, you can use an oscilloscope to measure the audio output while sending a sine wave with a maximum amplitude.







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited 10 hours ago









      Denton L

      31




      31










      answered 15 hours ago









      Michel KeijzersMichel Keijzers

      6,67092969




      6,67092969








      • 5




        $begingroup$
        Re, "...actually it breaks the speaker." If I can create a sound file that blows your speakers when you play it, the fault is not in my file. Your music player should at least be able to survive any sound file that you try to play.
        $endgroup$
        – Solomon Slow
        15 hours ago






      • 1




        $begingroup$
        @SolomonSlow Good point, I updated my answer (and learnt something myself from it).
        $endgroup$
        – Michel Keijzers
        15 hours ago










      • $begingroup$
        @SolomonSlow Some speakers won't be very happy if you play a mono-tone at a resonant frequency; And it happens quite often with sub woofer speakers; I'm sure you've heard some where the cone has been damaged. I agree the ideal is that the speaker should survive any input; but realistically if you find the right resonant frequency the damping of the speaker might not be sufficient to protect it.
        $endgroup$
        – UKMonkey
        5 hours ago














      • 5




        $begingroup$
        Re, "...actually it breaks the speaker." If I can create a sound file that blows your speakers when you play it, the fault is not in my file. Your music player should at least be able to survive any sound file that you try to play.
        $endgroup$
        – Solomon Slow
        15 hours ago






      • 1




        $begingroup$
        @SolomonSlow Good point, I updated my answer (and learnt something myself from it).
        $endgroup$
        – Michel Keijzers
        15 hours ago










      • $begingroup$
        @SolomonSlow Some speakers won't be very happy if you play a mono-tone at a resonant frequency; And it happens quite often with sub woofer speakers; I'm sure you've heard some where the cone has been damaged. I agree the ideal is that the speaker should survive any input; but realistically if you find the right resonant frequency the damping of the speaker might not be sufficient to protect it.
        $endgroup$
        – UKMonkey
        5 hours ago








      5




      5




      $begingroup$
      Re, "...actually it breaks the speaker." If I can create a sound file that blows your speakers when you play it, the fault is not in my file. Your music player should at least be able to survive any sound file that you try to play.
      $endgroup$
      – Solomon Slow
      15 hours ago




      $begingroup$
      Re, "...actually it breaks the speaker." If I can create a sound file that blows your speakers when you play it, the fault is not in my file. Your music player should at least be able to survive any sound file that you try to play.
      $endgroup$
      – Solomon Slow
      15 hours ago




      1




      1




      $begingroup$
      @SolomonSlow Good point, I updated my answer (and learnt something myself from it).
      $endgroup$
      – Michel Keijzers
      15 hours ago




      $begingroup$
      @SolomonSlow Good point, I updated my answer (and learnt something myself from it).
      $endgroup$
      – Michel Keijzers
      15 hours ago












      $begingroup$
      @SolomonSlow Some speakers won't be very happy if you play a mono-tone at a resonant frequency; And it happens quite often with sub woofer speakers; I'm sure you've heard some where the cone has been damaged. I agree the ideal is that the speaker should survive any input; but realistically if you find the right resonant frequency the damping of the speaker might not be sufficient to protect it.
      $endgroup$
      – UKMonkey
      5 hours ago




      $begingroup$
      @SolomonSlow Some speakers won't be very happy if you play a mono-tone at a resonant frequency; And it happens quite often with sub woofer speakers; I'm sure you've heard some where the cone has been damaged. I agree the ideal is that the speaker should survive any input; but realistically if you find the right resonant frequency the damping of the speaker might not be sufficient to protect it.
      $endgroup$
      – UKMonkey
      5 hours ago













      2












      $begingroup$

      Normally it's limited by the cellphone battery voltage, which is about 3.7V. However there are other limits in play like the EU volume limit of 100dB - which is specified as SPL rather than a voltage.






      share|improve this answer









      $endgroup$


















        2












        $begingroup$

        Normally it's limited by the cellphone battery voltage, which is about 3.7V. However there are other limits in play like the EU volume limit of 100dB - which is specified as SPL rather than a voltage.






        share|improve this answer









        $endgroup$
















          2












          2








          2





          $begingroup$

          Normally it's limited by the cellphone battery voltage, which is about 3.7V. However there are other limits in play like the EU volume limit of 100dB - which is specified as SPL rather than a voltage.






          share|improve this answer









          $endgroup$



          Normally it's limited by the cellphone battery voltage, which is about 3.7V. However there are other limits in play like the EU volume limit of 100dB - which is specified as SPL rather than a voltage.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 14 hours ago









          pjc50pjc50

          34.4k34288




          34.4k34288























              1












              $begingroup$

              These days a lot of DAC chips for consumer equipment use 2 Vrms standard.



              The supply voltage is largely irrelevant, as a lot of DAC chips also use internal charge pumps to boost up supply voltage and to generate negative supply voltage for the audio output stage, so they can drive DC coupled loads directly.






              share|improve this answer









              $endgroup$


















                1












                $begingroup$

                These days a lot of DAC chips for consumer equipment use 2 Vrms standard.



                The supply voltage is largely irrelevant, as a lot of DAC chips also use internal charge pumps to boost up supply voltage and to generate negative supply voltage for the audio output stage, so they can drive DC coupled loads directly.






                share|improve this answer









                $endgroup$
















                  1












                  1








                  1





                  $begingroup$

                  These days a lot of DAC chips for consumer equipment use 2 Vrms standard.



                  The supply voltage is largely irrelevant, as a lot of DAC chips also use internal charge pumps to boost up supply voltage and to generate negative supply voltage for the audio output stage, so they can drive DC coupled loads directly.






                  share|improve this answer









                  $endgroup$



                  These days a lot of DAC chips for consumer equipment use 2 Vrms standard.



                  The supply voltage is largely irrelevant, as a lot of DAC chips also use internal charge pumps to boost up supply voltage and to generate negative supply voltage for the audio output stage, so they can drive DC coupled loads directly.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 10 hours ago









                  JustmeJustme

                  1,9421411




                  1,9421411






















                      たくまいわき is a new contributor. Be nice, and check out our Code of Conduct.










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                      たくまいわき is a new contributor. Be nice, and check out our Code of Conduct.
















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