Diffraction occurs when waves, including sound waves, encounter an obstacle or opening that is comparable in size to their wavelength. Instead of simply blocking the waves, the obstacle or opening causes the waves to spread out, bend around the obstacle, and continue traveling.

Here's a breakdown:

* Sound Waves: Sound waves are longitudinal waves, meaning the particles in the medium (air, water, etc.) vibrate parallel to the direction of wave travel.

* Wavelength: The wavelength of a sound wave is the distance between two consecutive peaks or troughs in the wave.

* Obstacle: The obstacle could be anything, like a wall, a tree, or even a small opening.

* Diffraction: When a sound wave encounters an obstacle, a portion of the wave energy bends around the obstacle and spreads out. This causes the sound to appear to "bend" around the obstacle.

Examples of Diffraction:

* Hearing someone talking around a corner: You can hear the sound of someone talking even if you can't see them because the sound waves diffract around the corner.

* Sound from a car horn: When you hear a car horn, the sound waves spread out in all directions. You can hear the horn even if you are not directly in front of the car because the sound waves diffract around the car.

Factors affecting Diffraction:

* Wavelength: Shorter wavelengths diffract less than longer wavelengths. This is why you can hear bass frequencies better than higher frequencies when sound is coming from a room with a closed door.

* Size of the obstacle: The smaller the obstacle relative to the wavelength, the more diffraction will occur.

Let me know if you would like to delve deeper into any specific aspect of diffraction!