At approximately what frequency do most people perceive the least intense sounds?
Asked by maham237 @ in Physics viewed by 844 People
Although 0 dB is often referred to as the lower threshold of human hearing, it is important to realize that the human ear is not equally sensitive to all frequencies of sound. In other words, a particular noise may sound louder or softer depending on the frequency of the sound wave being transmitted. Because of this variation, scientists have defined a unit of loudness, called a phon, to represent the intensity of sound waves with a frequency of 1000 Hz: A 60-phon sound is one that is perceived by the human ear to have the same loudness as a sound wave with an intensity of 60 dB and a frequency of 1000 Hz .a) At approximately what frequency do most people perceive the least intense sounds?
b) For a sound at 100 Hz, what is the decibel level necessary for human perception?
c) How many times more intense is the least intense perceptible sound at 100 Hz compared to the least intense perceptible sound at 1000 Hz? Specifically, you are looking for the ratio I100Hz/I1000Hz.