The hydraulis, a precursor to the modern pipe organ invented by Ctesibius of Alexandria in the third century BCE, relied on a unique water-based system to regulate wind pressure. While earlier wind instruments depended entirely on the variable lung capacity of the performer, the hydraulis utilized a reservoir of water situated beneath a metal chamber. Air pumped into this chamber displaced the water, which in turn exerted a steady, upward hydrostatic pressure on the air. This pressurized air was then directed into the pipes when the keys were depressed. Although later Roman engineers replaced the water reservoir with weighted bellows to simplify the instrument’s transport, the original Greek design was highly praised by contemporaries specifically for its ability to maintain a remarkably consistent tone during extended performances.
According to the text, which statement is true about the original Greek hydraulis?
- It relied on hydrostatic pressure from water to maintain a consistent tone during extended performances.Answer
- BIt was designed by Roman engineers who added a water reservoir to make it easier to transport.
- CIt produced a significantly louder sound than earlier instruments that depended on a performer's lung capacity.
- DIt required multiple operators to pump air into the chamber while the keys were depressed.