Ben asked in Science & MathematicsMathematics · 1 month ago

# How many decibels was The Millennium Celebrations?

When Midnight struck 20 years ago on December 31st, 1999, and in January 1st, 2000, how many decibels were The New Millennium Celebrations from Around The World?

Relevance
• 1 month ago

So, the loudest human scream was recorded at 121.7 dB

In 2000, there were roughly 6,082,966,429 people world wide.

For ease of calculation, let's say 122 dB and 6.1 * 10^9 people

log(I/Io) = 122

I/Io = 10^122

I = 10^(122) * Io

Assuming everyone on earth shouted louder than any recorded scream, and they all did it in unison.

6.1 * 10^9 * I =>

6.1 * 10^9 * 10^(122) * Io =>

6.1 * 10^131 * Io

log(I/Io) = x

log(6.1 * 10^131 * Io / Io) = x

log(6.1) + 131 = x

x = 131.8 dB

That's about how loud a live rock concert is.  It's actually a little softer than a live rock concert, by about 3dB (so it's roughly half the intensity).

So why shout?  What does it accomplish?

• David
Lv 7
1 month ago

As a matter of accuracy The New Millennium began on January 1st 2001 because there was no zero year in the calendar that we use today as it went from 1 BC to 1 AD

• Dixon
Lv 7
1 month ago

I didn't  hear anything, so 0dB for me.