Ultrasound and the Physics of Hearing (Grade 10 NSC Matric Physical Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does a 10 dB increase represent in sound intensity?
What does a 10 dB increase represent in sound intensity?
10 times more intense
What sound level represents the threshold of hearing?
What sound level represents the threshold of hearing?
0 dB
At what sound level can hearing damage begin to occur over time?
At what sound level can hearing damage begin to occur over time?
80 dB
What defines ultrasound?
What defines ultrasound?
Sound above 20 kHz
What frequency range is used for ultrasonic cleaning of jewellery?
What frequency range is used for ultrasonic cleaning of jewellery?
20-40 kHz
How does medical ultrasound imaging work?
How does medical ultrasound imaging work?
Reflection at boundaries between tissues
What are the three main sections of the human ear?
What are the three main sections of the human ear?
Outer, middle, and inner ear
What is the function of the three small bones in the middle ear?
What is the function of the three small bones in the middle ear?
Amplify vibrations
What does the cochlea do in the hearing process?
What does the cochlea do in the hearing process?
Converts vibrations to electrical signals
At what sound level does immediate pain and potential damage occur?
At what sound level does immediate pain and potential damage occur?
120 dB