Infrasound is defined as sound waves with frequencies below 20 Hz, which is the lower limit of human hearing.

Natural sources of infrasound include volcanic eruptions, earthquakes, thunderstorms, and other geophysical phenomena.

Man-made sources of infrasound include industrial machinery, transportation vehicles, explosions, and other human activities.

Infrasound can be detected using microphones, geophones, hydrophones, and other specialized sensors.

Infrasound has a variety of applications, including monitoring volcanic activity, detecting earthquakes, studying ocean currents, and other scientific and industrial purposes.

Exposure to infrasound can cause a variety of health effects, including nausea, vomiting, headaches, and other symptoms.

Exposure to infrasound can be reduced by using soundproofing materials, avoiding noisy areas, wearing ear protection, and other measures.

Infrasound is defined as sound waves with frequencies below 20 Hz.

Industrial machinery is a man-made source of infrasound, while volcanic eruptions, earthquakes, and thunderstorms are natural sources.

Medical imaging is not an application of infrasound, while monitoring volcanic activity, detecting earthquakes, and studying ocean currents are.

Hearing loss is not a potential health effect of infrasound, while nausea, vomiting, and headaches are.

Listening to music is not a way to reduce exposure to infrasound, while using soundproofing materials, avoiding noisy areas, and wearing ear protection are.

The wavelength of a sound wave is given by the formula (\lambda = v/f), where (\lambda) is the wavelength, (v) is the speed of sound, and (f) is the frequency. At room temperature, the speed of sound in air is approximately 343 meters per second. Therefore, the wavelength of a 10 Hz infrasound wave in air at room temperature is 34.3 meters.

The frequency of a sound wave is given by the formula (f = v/\lambda), where (f) is the frequency, (v) is the speed of sound, and (\lambda) is the wavelength. At room temperature, the speed of sound in air is approximately 343 meters per second. Therefore, the frequency of an infrasound wave with a wavelength of 1 meter in air at room temperature is 343 Hz.

The intensity of a sound wave is given by the formula (I = P^2/(2\rho v)), where (I) is the intensity, (P) is the sound pressure, (\rho) is the density of the medium, and (v) is the speed of sound. At room temperature, the density of air is approximately 1.29 kg/m^3 and the speed of sound in air is approximately 343 meters per second. Therefore, the intensity of a 100 dB infrasound wave in air at room temperature is 10^-6 W/m^2.