- Chirped Echo from the Mayan Pyramid of Kukulkan at Chichen Itza - David Lubman of the Acoustical Society of America argues that the echo sounds like the primary call of the Mayan sacred bird, the Quetzal.
- John William Strutt (Lord Rayleigh) - Biography of Lord Rayleigh, 1842-1919, with information on his scientific research on a range of topics including travelling waves where his theory has now developed into the theory of solitons.
- Moving Beyond Prophecies & Predictions - Book by Cynthia Gage. (Atlantis Rising)
- The Sound of a Voice - Mike Penney’s page devoted to Victorian sound recording and telephony.
