Acústica

CD2 1.3 Measurement of the speed of sound in air

CD2 1.6

Principle

It should be verified, how the frequency measured from the stationary microphone changes, when a constant frequency fed loudspeaker is moved slowly towards or away from the microphone. Here, the frequency should be represented as a function of the speed of the sound ...

ANÁLISIS DE SONIDOS

Principle

Investigate the spectra of different musical instruments. Show that the acoustic spectrum can be influenced by thetype of excitation. Different musicalinstruments supply different spectra:even when the same note is played.

Musical intervals

Principle

The monochord can be used to link together knowledge of music and physics. In music, notes are named with letters. The intervals between the notes also have certain names. The monochord is a musical instrument and a "measurement instrument" at the same time. If ...

VELOCIDAD DEL SONIDO EN METALES

Principle

The velocity of sound in steel is determined by measurement of sound travel times across metal rods of known lengths.

Task

1. Determine the sound velocity by measuring the sound travel times in stainless steel f ...

VELOCIDAD DEL SONIDO EN EL AIRE

Principle

The velocity of sound in air is determined by measurement of sound travel times across known distances.

Task

1. Determine the sound velocity in air for different distances between sound source and microphone.

EFECTO DOPPLER ACUSTICO

Principle
If an emitter of sound or a detector is set into motion relative to the medium of propagation, the frequency of the waves that are emitted or detected is shifted due to the Doppler effect.

Task

1. Measure the Dopp ...

EFECTO DOPPLER ACUSTICO

DETERM. DE LA VELOCIDAD DEL SONIDO CON TUBO DE KUNDT

Principle

Cork dust in a glass tube is set into tiniest motion by a sound wave. If the frequency of the sound wave matches the natural frequency of the volume in the glass tube, a standing wave will form. The corc dust then assembles in visible patterns that sh ...

LONGITUDES Y FRECUENCIAS DE ONDAS CON EL TUBO DE QUINCKE

Principle

When a sound wave of a particular frequency is divided into two coherent components (like, for example, light waves in an interferometer experiment), and if the path of one of the component waves is altered, it is possible to calculate the wavelength ...

DIFRACCION DE ULTRASONIDO CON ABERTURA SIMPLE Y DOBLE

Principle

A plane ultrasonic wave is subjected to diffraction at single slits of various widths and at various double slits. The intensity of the diffracted and interfering partial waves are automatically recorded using a motordriven, swivel ultrasound detector and a PC.

Ultrasonic diffraction at Fresnel lenses / Fresnel zoneconstruction

Principle

A plane ultrasonic wave strikes a Fresnel zone plate. The sound intensity is determined as a function of the distance, using an ultrasonic detector that can be moved in the direction of the zone plate axis.

Tasks

1. Determine and pl ...

Generation of sound waves

Principle

Sounds are generated by oscillations. The sound volume is influenced by their relative amplitude, while the sound pitch depends on their frequency. This relationship is examined based on three examples: oscillating ruler, tuning fork, string of a mon ...

Propagation of sound in air

Principle

This experiment demonstrates, particularly clearly, the propagation of sound waves in air and, thereby,
the working principle of the eardrum that is caused to oscillate by pressure waves.

The movement of the membrane is transfe ...

Propagation of sound in solid bodies

Principle

The transmission (or conduction) of sound through a solid body means: One end of the solid body is caused to oscillate (e.g. by placing a tuning fork on it). This oscillation propagates through the solid body to the other end of the solid body. The tr ...