![]() What is another name for "Standards of Normal Hearing"? It's an NBS (National Bureau Standards) 6 cc Coupler used to establish Standards of Normal Hearing. What is the artificial ear based in? What does it establish? Threshold is defined as the intensity of the sound measured in an artificial ear needed to reach threshold. How do we define threshold when using coupler pressures? The intensity of sound needed to reach threshold with individual listening with earphones. MAF binaural you hear better with both ears. Which has a greater sensitivity to intensity- MAF binaural or monaural? MAF monaural has a 6 dB advantage over MAP even with one ear, you can hear more changes in dB from the sound field. Which has a higher sensitivity to intensity- MAF monaural or MAP? By how much? In MAP, at what frequency is the human ear most sensitive? Why?ġ000 Hz resonant frequency changed with headphones. In MAF, at what frequency is the human ear most sensitive? Threshold= the intensity of the sound measured at the ear drum needed to reach threshold. (the lowest intensity at which client responds 50% of the time) Minimal Audible Pressure measures the intensity of sound needed to reach threshold with individual listening with earphones. Monaural condition (ear plug in one ear) or binaural condition. What two conditions is MAF carried out in? Threshold= the intensity of the sound measured at the listener's ear (microphone in ear) needed to reach threshold. Minimal Audible Field measures the intensity of sound needed to reach threshold with the individual listening in the sound field. Minimal Audible Field (MAF), Minimal Audible Pressure (MAP), and Coupler Pressure. ![]() What are three ways to measure human audibility? There's differential sensitivity at hearing threshold. The ear is not equally sensitive to all frequencies of sound more intensity is needed at some frequencies to detect the presence of sound than at others. What does the human audibility curve reveal about the ear's sensitivity? Otologically normal hearing listeners b/w the ages of 19 and 26 years, no history of ear disease, no history of prolonged exposure to high intensity sound. What population is the human audibility curve based on? The lowest intensity level of a sound an individual can detect 50 % of the time. It plots the threshold of hearing (in dB SPL) as a function of frequency. What does the Human Audibility Curve plot? ![]() Measuring the sensitivity of the human ear to different frequencies of sound. What does the Human Audibility Curve result from? It's not always one-to-one intensity is absolute while loudness is relative. What's the ratio between loudness and intensity? Loudness is perceived to increase as intensity increases, and vice versa. Intensity is a physical, absolute measurement, while loudness is a subjective/psychological awareness of intensity.Īs the intensity of sound increases, how do we perceive loudness? What's the difference b/w intensity and loudness? What is the Human threshold of hearing (on scale of Human Sensitivity to Intensity)? It's not always a one-to-one ratio frequency is absolute, pitch is relative. We perceive an increase in pitch as frequency increases, and vice versa. What is the difference between frequency and pitch?įrequency is the physical aspect of sound that can be measured, pitch is the psychological aspect of sound that is based in a subjective awareness of frequency.Īs the frequency of sound increases, how do we perceive pitch? The ultrasonic bats use sonar at around 85,000 Hz. What is the range above 20,000 Hz for humans called? What animal communicates in this range? What is the range below 20 Hz called for humans? What is the range most important for speech reception? What sounds are left out of this range?ĥ00 to 2000 Hz fricatives are above 2000 Hz. What is the most sensitive frequency range?ĥ00 to 8000 Hz we have the best hearing for the sounds we produce. What frequencies is audible range for humans? The auditory sensation evoked by the propogation of "sound waves". In psychological terms, what is the definition of sound? What are the three measures of perception?ĭetection, discrimination (describing pitch and loudness), and identification. Answers the question: What can humans hear and what do they hear? The relationship between an acoustic signal and subjective awareness.
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