$reflection refraction and diffraction of sound waves$

$reflection refraction and diffraction of sound waves$

The greater the difference in the speed of sound between media, or the larger the difference in wind speed with height, the more pronounced the refraction. This occurrence is due to differences in the speed of sound within the media, which can vary based on the density, temperature, and humidity of the medium. Refraction refers to the phenomenon where sound waves change direction at the boundary between two media. Since frequency is inversely proportional to wavelength, lower frequencies diffract better than higher frequencies. Moreover, when listening to loud music in a neighboring room with the door closed, the bass or drum sounds, which are of lower frequency, often penetrate the walls more clearly. Sounds with lower frequencies (bass sounds) diffract more effectively around obstacles, so we often experience hearing lower sounds, like the thumping of footsteps, from behind walls. As the frequency gets lower, it becomes more omnidirectional as the frequency gets higher, it becomes more highly directionalįor instance, the reason we can hear sounds from behind a wall in everyday life is due to this diffraction phenomenon. As a result, waves that would have originally propagated in a straight line can spread out in a semi-circular pattern around the obstacle. This means that if the wavelength is long and the size of the obstacle is small, the wave spreads out more widely around the obstacle. When the wavelength of the sound wave is longer compared to the size of the obstacle, the diffraction becomes more pronounced.

$reflection refraction and diffraction of sound waves$

Greater diffraction occurs when the obstacle is large (or the gap is narrow). The degree of this diffraction is heavily influenced by both the size of the obstacle and the wavelength of the sound wave. Diffraction of sound refers to the phenomenon where sound waves spread out as they travel around obstacles or edges.

$reflection refraction and diffraction of sound waves$

Reflection refraction and diffraction of sound waves