History: What is the volume level of speech?

What is the volume level of speech?

• Usually, 0 to 140 dB SPL.
  Those would be very loud or very quiet voices.
• Usually, 80 to 90 dB SPL.
  This is the range of recommended music listening.
• 60 to 70 dB SPL.
  Correct!
• 100 dB SPL and above.
  Those would be very loud voices.