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Answer:
1) Pitch, intensity, and loudness are three different characteristics of sound. Pitch refers to the highness or lowness of a sound and is determined by the frequency of the sound wave. Intensity refers to the amount of energy in a sound wave and is measured in decibels (dB). Loudness, on the other hand, is the subjective perception of intensity and is influenced by factors such as the sensitivity of the human ear and the surrounding environment.
2) Pitch and wavelength are related in that the pitch of a sound is determined by the frequency of the sound wave, which is inversely proportional to the wavelength. Higher frequencies have shorter wavelengths, resulting in higher-pitched sounds, while lower frequencies have longer wavelengths, resulting in lower-pitched sounds.
3) Loudness can differ from person to person due to variations in the sensitivity of their ears, as well as individual differences in perception and tolerance to loud sounds. Age, exposure to loud noise, and certain medical conditions can also affect a person's loudness perception.
4) As an ambulance approaches and passes by, the sound it produces changes due to the Doppler effect. The Doppler effect is the apparent change in frequency and pitch of a sound wave as the source of the wave moves relative to the observer. As the ambulance approaches, the sound waves are compressed, resulting in a higher pitch. As it passes by and moves away, the sound waves are stretched out, resulting in a lower pitch.
4) Some ways to protect the human ear from noise pollution include wearing earplugs or noise-cancelling headphones in loud environments, limiting exposure to loud noises, and using sound-absorbing materials in buildings and public spaces. It is also important to be aware of the potential harmful effects of noise pollution and take steps to reduce its impact on our daily lives.
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