Explain how the sound of Elina's voice travels from her mouth and is detected by her phone. Use the analogy with the human ear to support your explanation.

Sure, here's a step-by-step explanation:

1. Sound Production: The process begins when Elina speaks. The vocal cords in her throat vibrate to produce sound waves. These sound waves are essentially disturbances in the air around her.

2. Sound Propagation: These sound waves then travel through the air as a series of compressions and rarefactions (analogous to the crests and troughs of a water wave). This is similar to how our ears pick up sound. The outer ear (pinna) collects sound waves from the environment and funnels them into the ear canal.

3. Microphone Detection: The microphone on Elina's phone acts like the eardrum in the human ear. When the sound waves reach the microphone, they cause a diaphragm inside the microphone to vibrate. The eardrum in our ear also vibrates when hit by sound waves.

4. Conversion to Electrical Signals: These vibrations are then converted into electrical signals by the microphone. This is similar to