Ear, Nose and Throat
- Q How do noise cancellation headphones work?
Dr. Mehmet Oz, CardiologyIn noisy situations—doing yard work with power tools or maybe dinner with the extended family—it's worth using noise cancellation headphones, which emit energy in a frequency that we can't hear. The sound waves they create have the same... Full Answer
- Q How many ranges of sound frequency can the human ear hear?
Dr. Michael Roizen, Internal MedicineYou have two frequency ranges with which you usually hear sound. High-frequency ranges (which is the first to go when you experience hearing loss) helps you hear things like leaves rustling and whispering consonants, while low-frequency ranges helps you... Full Answer
- Q What is a laryngoscopy?
A laryngoscopy is a procedure in which a medical professional examines the larynx. There are two types of laryngoscopies that are used to diagnose laryngeal cancer. The first is an indirect laryngoscopy. In an indirect laryngoscopy, a doctor uses a... Full Answer