Óptica geométrica y ondas · GCSE Physics Topic 6 (Sound Waves)
Simulador de ondas sonoras y osciloscopio
Simulador de características de ondas sonoras y osciloscopio: tono, timbre y volumen
- Cálculo en cliente
- Sin registro
- Derivación en vivo
- Modo proyector
- Hoja de trabajo A4
Ventana de simulación 3D● 60 FPS
Variables de control del experimento
Hz
%
Derivaciones y métricas en tiempo real
Periodo de la onda T
--
Velocidad del sonido v
--
Longitud de onda acústica λ
--
Categoría audible
--
Derivación de fórmulas en tiempo real
Fórmula básica:
--Sustitución de valores:
--Estado físico: --
Ejemplos clásicos y análisis de errores en exámenes
Worked Problem
Problema: In 15°C air (v=340m/s), what are the period and wavelength of a 1000Hz sound?
Derivación paso a paso:
- Period T = 1/f = 1ms. Wavelength λ = v/f = 340/1000 = 0.34m = 34cm.
Worked Problem
Problema: Wave A oscillates 500 times/s with 2cm amplitude; Wave B oscillates 1000 times/s with 1cm amplitude. Compare pitch and loudness.
Derivación paso a paso:
- Wave B has higher frequency (1000Hz > 500Hz) so higher pitch. Wave A has larger amplitude (2cm > 1cm) so greater loudness.
Hoja de indagación en clase y tareas
Q1. Variant 1: Striking a tuning fork harder changes what on the oscilloscope? What changes and what stays constant?
Answer Key: Wave crest amplitude increases; wave density (frequency) stays identical. Loudness increases; pitch and timbre remain unchanged.
Q2. Variant 2: When pouring boiling water into a thermos, does the sound pitch rise or fall? Why?
Answer Key: Pitch rises higher. Rising water level shortens the vibrating air column, raising its resonant frequency.
Q3. Variant 3: What is human audible hearing range? What are the frequency ranges of ultrasound and infrasound?
Answer Key: Human range: 20Hz - 20,000Hz. Ultrasound > 20,000Hz (bats, sonar). Infrasound < 20Hz (earthquakes, tsunamis).
Preguntas frecuentes y errores conceptuales
In common language, does "singing high and low" refer to pitch or loudness?
It refers to loudness (volume)! Everyday speech confuses loud with high. In physics, "pitch" strictly refers to acoustic frequency.
Can sound travel in vacuum? How do astronauts talk on Moon?
Sound strictly cannot travel in vacuum. Astronauts communicate via electromagnetic radio waves, or touching helmets for solid conduction.
What is sonar echo ranging? What minimum distance is needed to distinguish an echo?
Ears need 0.1s gap between original and reflected sound. Minimum distance s = 0.5 * 340 * 0.1 = 17m.
How do Active Noise Cancelling (ANC) headphones eliminate noise?
Acoustic wave cancellation! Microphones detect noise and emit an anti-phase inverted soundwave (180° offset), cancelling sound pressure.