Which of the following statements are TRUE of the frequency of sound and the perception of pitch? Identify all that apply. A high pitched sound has a low wavelength. A low-pitched sound is a sound whose pressure fluctuations occur with a low period. If an object vibrates at a relatively high frequency, then the pitch of the sound will be low. The frequency of a sound will not necessarily be the same as the frequency of the vibrating object since sound speed will be altered as the sound is transmitted from the object to the air and ultimately to your ear. Two different guitar strings are used to produce a sound. The strings are identical in terms of material, thickness and the tension to which they are pulled. Yet string A is shorter than string B. Therefore, string A will produce a lower pitch. Both low- and high-pitched sounds will travel through air at the same speed. Doubling the frequency of a sound wave will halve the wavelength but not alter the speed of the wave. Tripling the frequency of a sound wave will decrease the wavelength by a factor of 6 and alter the speed of the wave. Humans can pretty much hear a low-frequency sound as easily as a high-frequency sound. Ultrasound waves are those sound waves with frequencies less than 20 Hz.
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Which of the following statements are TRUE of the frequency of sound and the perception of pitch? Identify all that apply.
- A high pitched sound has a low wavelength.
- A low-pitched sound is a sound whose pressure fluctuations occur with a low period.
- If an object vibrates at a relatively high frequency, then the pitch of the sound will be low.
- The frequency of a sound will not necessarily be the same as the frequency of the vibrating object since sound speed will be altered as the sound is transmitted from the object to the air and ultimately to your ear.
- Two different guitar strings are used to produce a sound. The strings are identical in terms of material, thickness and the tension to which they are pulled. Yet string A is shorter than string B. Therefore, string A will produce a lower pitch.
- Both low- and high-pitched sounds will travel through air at the same speed.
- Doubling the frequency of a sound wave will halve the wavelength but not alter the speed of the wave.
- Tripling the frequency of a sound wave will decrease the wavelength by a factor of 6 and alter the speed of the wave.
- Humans can pretty much hear a low-frequency sound as easily as a high-frequency sound.
- Ultrasound waves are those sound waves with frequencies less than 20 Hz.
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