Question 1: Ultrasound refers to sound waves with frequencies above the audible range for humans, typically above 20 kHz. These high-frequency sound waves are used in various technological and medical applications due to their ability to penetrate materials and tissues.

Answer: Ultrasound are sound waves with frequencies above 20 kHz used in medical imaging, industry, and other fields.

Question 2: Explain why ultrasound waves are not audible to humans.

Answer: Because their frequency is higher than the upper limit of human hearing, which is about 20 kHz.

Question 1: What type of device commonly produces ultrasound waves in medical imaging?

Answer:

Question 2: Fill in the blank: Ultrasound waves are longitudinal waves that require a medium such as ____, ____ or ____ to travel through.

Answer: air, water, tissue

Question 3: Describe how the frequency of ultrasound affects its ability to penetrate different materials.

Answer: Higher frequency ultrasound waves have shorter wavelengths and are absorbed more quickly, limiting their penetration depth. Lower frequency ultrasound waves have longer wavelengths, allowing them to penetrate deeper into materials.

Question 1: Name two common medical procedures that utilize ultrasound technology.

Answer: Ultrasound imaging (sonography) and fetal monitoring.

Question 2: Explain how ultrasound can be used to detect internal body structures without making a surgical incision.

Answer: Ultrasound waves are transmitted into the body, and their echoes are reflected back from internal structures. These echoes are collected and processed to produce images of organs and tissues, allowing non-invasive diagnosis.

Question 1: Multiple choice: Which of the following is a common industrial application of ultrasound?

Answer:

Question 2: Describe one safety precaution that must be considered when using ultrasound devices in industrial settings.

Answer: Ensuring that exposure levels are within safe limits to prevent tissue or material damage, and using proper shielding to protect operators from high-frequency waves.

Question 1: An ultrasound transducer emits waves at 5 MHz frequency. If the wave's speed in tissue is approximately 1540 m/s, calculate the wavelength of the ultrasound in tissue.

Answer: Wavelength = speed / frequency = 1540 m/s / 5,000,000 Hz = 0.000308 m or 0.308 mm

Question 2: Explain why higher frequency ultrasound waves are more suitable for detailed imaging but have limited penetration depth.

Answer: Higher frequency ultrasound waves have shorter wavelengths, which provide better resolution and detailed images. However, they are absorbed more quickly by tissues, reducing their ability to penetrate deeply, making them ideal for surface or detailed imaging but not for deep tissues.

Question 1: In your own words, summarize the main advantages of using ultrasound technology in medical diagnostics.

Answer: Ultrasound is a non-invasive, safe, and efficient method for imaging internal body structures. It provides real-time images, does not use ionizing radiation, and can be used repeatedly for monitoring conditions, making it highly advantageous for medical diagnostics.