Charm
Sonorus
soh-NOR-us
Magnifies the caster's voice to fill an arena, a stadium, or any large outdoor space. The counter-charm, Quietus, returns the voice to normal volume.
- Type
- Charm
- Category
- Mind, Sound & Concealment
- First appearance
- Harry Potter and the Goblet of Fire
- Pronunciation
- soh-NOR-us
Sonorus is the wizarding world's microphone. Cast on the caster's own throat — wand tip pressed lightly to the neck — it dramatically amplifies the voice, allowing the user to address a Quidditch stadium, a crowded duelling chamber, or any large open space with no electronic gear required. The amplification is clean and steady; the voice does not distort or echo unpleasantly. It simply becomes a great deal larger.
The charm's most visible recurring use is at the Quidditch World Cup and at Hogwarts Quidditch matches, where the commentator — Lee Jordan in Harry's school years, Ludo Bagman at the World Cup — performs every match Sonorused. The result is a running commentary audible across an entire stadium, with the speaker at no particular podium and no obvious technology. To muggle eyes, this would be inexplicable; to wizarding ears, it is so commonplace nobody comments on it.
Voldemort gives Sonorus a darker turn during the Battle of Hogwarts. After Harry retreats into the castle following his apparent death, Voldemort uses the charm to address the entire grounds — every defender, every student, every member of the Order, the whole castle echoing with his voice — declaring that Harry is dead and demanding surrender. The cast in that moment is uncomfortably effective. A voice that fills the whole castle is harder to ignore than a voice that doesn't.
The counter-charm, Quietus, returns the voice cleanly to normal volume. Most users cycle Sonorus and Quietus in pairs, the way Lumos and Nox are paired — magic on, magic off, no sustained spell to maintain in the background. Practiced commentators flicker between them effortlessly across a long match.
Notable uses
- Lee Jordan's ongoing Quidditch commentary throughout the Hogwarts series, including his famous biased reporting under McGonagall's increasingly exasperated supervision.
- Ludo Bagman's commentary at the Quidditch World Cup quarterfinal between Ireland and Bulgaria (Goblet of Fire).
- Voldemort's castle-wide address after Harry's apparent death in the Forbidden Forest, demanding the defenders' surrender (Deathly Hallows).
Sonorus FAQ
What does Sonorus mean?+
Latin sonor — "sound, noise." The English word sonorous shares the same root, with a related sense of "resonant, deep-voiced."
What's the counter-charm?+
Quietus, which returns the amplified voice cleanly to normal volume. The two charms are typically used as a pair, much like Lumos and Nox.
How does Sonorus work mechanically?+
The caster touches their wand to their own throat and speaks the incantation. The voice amplifies immediately and stays amplified until Quietus is cast or the caster's concentration breaks. There is no obvious technology and no obvious source — the sound simply fills whatever space the caster is in.
Can Sonorus be used to deafen an opponent?+
Not directly. The charm amplifies the caster's voice but doesn't produce damaging volume — it makes a normal voice arena-sized, not painfully loud. For actual sonic offense, the wizarding curriculum reaches for different spells.
Test your wizarding knowledge
Every spell in the wizarding world has a place in the Potterhead app — daily puzzles, trivia O.W.L.s and N.E.W.T.s, and the House Cup standings.