Decibel Levels and Perceived Volume Change

Here is information about decibel levels and perceived volume change. Here’s the quick read info, with supporting documentation below.

  • 3dB = twice the power
  • 6dB = twice the amplitude
  • ~10dB = twice the perceived volume
  • Adding up two 12dB noise sources will get you, on average, 15dB (which will not sound twice as loud)

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Why Do Songs Get Stuck In Your Head

 Ever have a melody play over and over in your mind all day and you can’t get ride of it? I think most of us have had that experience many times over.

Here is an explanation of that phenomenon by Daniel Levitin, author of “This Is Your Brain On Music”:

You said that  “music sticks in the head,”  and in fact I’ve turned off the Stones but I can still hear Mick going  “oooh”  in my brain. Why do songs get lodged in there like that?

Maybe it’s meant to get stuck in your head. Having “music in the head” allows you to experiment with variations. A lot of people report that when a song gets stuck in their head, the tempo will change a little, or the notes will. So it could be a kind of a game for exercising the mind. When a song gets stuck, it’s not the whole thing; it’s usually about 20 seconds of it. That’s about the same length as auditory short-term memory. And the songs tend to be relatively simple ones. It’s more likely Rihanna that’s in there and not Stravinsky or Mahler.

Opera

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Det er temmelig hårdt at gå på arbejdet efter en dejlig lang ferie. Men i morgen er det weekend og vi skal til Svendborg, ja nærmere Valdemar slot og hører opera.

Her i huset er vi store fan af opera, min mand mere end andre. Men især disse udendørs operaer er dejlig at gÃ¥ til. Sidste weekend var vi til opera i Teater Hedeland (tæt ved Roskilde), og se Turandot. Det er den med arien”Nessun dorma”, som Pavarotti udødeliggjorde. Lyt til den via youtube linket i højre side af bloggen.

Men altsÃ¥, udendør opera er dejligt. Vi medbringer picnic kurv og sidder og hygger os et par timer før forestillingen, læser om handlingen i “Bogen om opera”. Stemningen til disse arrangementer er meget afslappet, glade, positive folk der er interesseret i opera. Og denne gang bemærkede vi at mange unge mennesker havde fundet vej. Det er mÃ¥ske ved at være moderne at hører opera.

Scientists Want to Test DNA on Chopin’s Heart

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WARSAW, Poland — Like a religious relic, the heart of composer Frederic Chopin rests in a Warsaw church, untouched since it was preserved in alcohol after his death in 1849 at age 39.

And that’s how the Polish government wants to keep it.

Scientists want to remove the heart for DNA tests to see if Chopin actually died from cystic fibrosis and not tuberculosis as his death certificate states.

Read Full Article on Chopin’s Heart DNA Testing

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