Hertzle (HalfQuiz)
Rate itListen to three tones and guess each one's frequency in hertz.
Every day: One numbered quiz a day, the same three tones for everyone, each to estimate between 150 Hz and 2,500 Hz, for up to 600 points. New puzzle: Once a day.

Hertzle is a daily listening game on HalfQuiz. You hear a tone, guess its frequency somewhere between 150 Hz and 2,500 Hz, and score up to 200 points by how close you are; three rounds make a maximum of 600 points.
About Hertzle (HalfQuiz)
Hertzle tests your ear with plain tones. Each round plays a sound, and you set your guess in hertz with a number box; on the easier settings the game also tells you what note your guess sounds like, such as 440 Hz sounding like an A. Your score for the round depends on how close your guess lands to the real frequency, up to 200 points, and three rounds add up to a total out of 600.
Difficulty changes how much help you get: Easy lets you play your guess back to compare, Medium shows the approximate note, and Hard gives no help at all. You can also choose a sine or triangle waveform.
The Daily mode is one numbered quiz per day, the same for everyone, and signing in puts your score on a leaderboard. Free Play generates unlimited random quizzes. HalfQuiz hosts other quiz games beside it. It suits musicians and anyone curious how well they can judge pitch.
How to play Hertzle (HalfQuiz)
- Choose a difficulty and waveform, keep Game Mode on Daily, and press Start Game (mind the volume).
- Listen to the round's tone.
- Enter your guess in hertz, between 150 and 2,500, and press Guess.
- Play all three rounds for a total out of 600.
Tips
- Learn a few anchors: concert A is 440 Hz, and each octave doubles the frequency.
- On Easy, play your guess back and compare it with the tone before submitting.
- Low tones are harder to judge on small speakers; use headphones.
Questions
Is the daily quiz the same for everyone?
Yes. Daily mode is one quiz per day, the same for every player; Free Play is random.
How is it scored?
Up to 200 points per round by how close your guess is to the real frequency, 600 in all.
Ratings and reviews
No ratings yet. Be the first to rate Hertzle (HalfQuiz).
Games like Hertzle (HalfQuiz)

Dialed Sound
Hear tones and recreate each pitch from memory

Daily Jingle
Name the notes of a short daily melody

Chordle
Find the day's chord by ear and by notes

HUNDO
Daily answers scored by how close you get

Amountle
Watch objects pour into a jar and guess how many, five times a day.

Fermle
Guess the right power of ten for one hard-to-know number a day, in five tries.

GeoSlice
Draw a line across the day's map to split its population as evenly as you can.

Magnitudle
Daily estimation games: resize silhouettes to true scale and make one guess at a hard-to-picture number.