Cry of Jelicuon
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Interactive Explore

Drum Wave Explorer

Festival context —Adjust the drum strike force (amplitude) and strike tempo (frequency) to visualize the generated sound waveform. Hear how these properties shape the sound that drives the Cry of Jelicuon performers.

S8FE-IVa-25Grade 8 · Quarter 4Describe Characteristics of Sound Waves

Drum Wave Explorer

Interactive Simulator
"Adjust the drum strike force (amplitude) and strike tempo (frequency) to visualize the generated sound waveform. Hear how these properties shape the sound that drives the Cry of Jelicuon performers."
Festival Drum — Sound WaveS8FE-IVa-25Transverse viewLongitudinal (real sound) — compressions & rarefactionsone wavelength λWAVELENGTH λ = 343 / f68.6 m343 ÷ 5 HzTempo (visual)5 HzAmplitude50%MEDIUMbigger strike = louderv = f λ · sound = 343 m/s in air

Same wave, two views — taller = louder (amplitude); tighter = shorter λ (faster tempo).

Adjust Variables

Strike Force / Amplitude50 %
10100
Tempo / Frequency (Hz)5 Hz
120

Physics ReadoutsLIVE

Wavelength (λ)68.60 m
wavelength = 343 / frequency

Community Hub — Cultural Discussion

Reflect & Connect

The festival drumline controls the entire crowd's emotional response. How does a drummer use amplitude and frequency together to signal different moments — the tense buildup before the battle scene versus the triumphant finale? Design a drum sequence for three key moments in the Cry of Jelicuon reenactment.

Discuss with your class or write your response in your science journal.

Performance Task

Clap Your Own Sound Wave

1Do

Clap your hands at a slow tempo (about 1 clap per second) for 10 seconds, then switch to a fast tempo (about 3 claps per second) for 10 seconds. Have a partner count the claps for each tempo. Then clap softly vs. loudly at the same tempo — note the difference in loudness.

2Measure

Record claps per second for slow and fast tempos — this is your frequency in Hz. Use v = fλ with v = 343 m/s to calculate the wavelength for each tempo. Also note which clap (soft vs. loud) has higher amplitude.

3Reflect

Your slow clap (low f) has a longer wavelength; your fast clap (high f) has a shorter wavelength — matching S8FE-IVa-25. In the Cry of Jelicuon, the drumline signals the revolt battle scene with a rapid, loud beat (high frequency, high amplitude). Using your measurements, explain why this combination creates urgency and energy in the audience.

Record your measurements and reflections in your science journal.

Module Overview

Up Next

Video

High Drum, Low Drum: How Frequency Controls the Sound of the Cry of Jelicuon