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When one of two tuning forks of the same size is struck, the other begins to vibrate also. This is an example of resonance or sympathetic vibration. The body of a violin affecting the sound of the violin is also.<ref name="Stevens & Warshofsky Chapter One" />
When one of two tuning forks of the same size is struck, the other begins to vibrate also. This is an example of resonance or sympathetic vibration. The body of a violin affecting the sound of the violin is also.<ref name="Stevens & Warshofsky Chapter One" />
Sound intensity (loudness) is measured is decibels after Bell, the inventer of the sound-only telephone. A sound ten times stronger is ten decibels louder, 100 times as intense is 20 decibels louder, and 1,000 times more intence is only 30 dedibels louder, because of the ear’s protective mechinism.<ref name="Stevens & Warshofsky Chapter One" />
Sound intensity (loudness) is measured is decibels after Bell, the inventor of the sound-only telephone. A sound ten times stronger is ten decibels louder, 100 times as intense is 20 decibels louder, and 1,000 times more intence is only 30 dedibels louder, because of the ear’s protective mechinism.<ref name="Stevens & Warshofsky Chapter One" />
Reverberation is sound echoing and reechoing. Wallace Sabine measured reverberation in a lecture hall using a stopwatch. He then measured the effect of sound absorbing materials such as seat cushions. He found they reduced the duration of the reverberation.<ref name="Stevens & Warshofsky Chapter One" />
Reverberation is sound echoing and reechoing. Wallace Sabine measured reverberation in a lecture hall using a stopwatch. He then measured the effect of sound absorbing materials such as seat cushions. He found they reduced the duration of the reverberation.<ref name="Stevens & Warshofsky Chapter One" />