1. We measure sound intensity (also referred to as sound power or sound pressure) in units called decibels. Decibels (dB) are named in honor of Alexander Graham Bell, the inventor of both the telephone and the audiometer.
2. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.
3. Sound energy occurs when an object vibrates. Noise, whether within the human range of hearing or not, is sound energy.
4. The back and forth motion of the object is called vibration or oscillation
5. Echoes are reflections. Sound bounces off a surface such as the canyon walls and returns so you hear it again. Just as a mirror reflects light, hard surfaces such as canyon walls reflect sound.
Answers & Comments
Verified answer
[tex]\huge{\blue {\bold {Answer:}}} [/tex]
B.
[tex]____________________________________[/tex]
#CARRYONLEARNING
[tex]\huge\bold\color{red}{Hope it Helps!}[/tex]
Answer:
1. D decibel
2. E echo
3. A sound
4. B vibration
5. C reflection
Explanation:
1. We measure sound intensity (also referred to as sound power or sound pressure) in units called decibels. Decibels (dB) are named in honor of Alexander Graham Bell, the inventor of both the telephone and the audiometer.
2. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.
3. Sound energy occurs when an object vibrates. Noise, whether within the human range of hearing or not, is sound energy.
4. The back and forth motion of the object is called vibration or oscillation
5. Echoes are reflections. Sound bounces off a surface such as the canyon walls and returns so you hear it again. Just as a mirror reflects light, hard surfaces such as canyon walls reflect sound.