a finite element model of an average human ear canal to
... nearly uniform, because the quarter wavelength of the signal is large compared to the dimensions of the ear canal. This situation is not valid at higher frequencies, where the ear canal is long enough so that one or more standing wave minima - caused by reflection at the eardrum - arise. These stand ...
... nearly uniform, because the quarter wavelength of the signal is large compared to the dimensions of the ear canal. This situation is not valid at higher frequencies, where the ear canal is long enough so that one or more standing wave minima - caused by reflection at the eardrum - arise. These stand ...
Psychoacoustic and physiological reflections of hearing loss: C315/A6
... of loudness and reduced dynamic range. – Reduced frequency selectivity: spectral smearing of speech signal. ...
... of loudness and reduced dynamic range. – Reduced frequency selectivity: spectral smearing of speech signal. ...
senses part i: the eyes - structure and function
... One of the functions of the semicircular canal mechanism is to aid visual fixation on moving targets. If the canals are stimulated under experimental conditions, reflex responses result in movement of the eyes called nystagmus. Characteristic of this particular type of nystagmus are the slow and fas ...
... One of the functions of the semicircular canal mechanism is to aid visual fixation on moving targets. If the canals are stimulated under experimental conditions, reflex responses result in movement of the eyes called nystagmus. Characteristic of this particular type of nystagmus are the slow and fas ...
anatomy and physiology of the ear
... The movement of the ossicles may be stiffened by two muscles, the stapedius and tensor tympani, which are under the control of the facial nerve and trigeminal nerve, respectively. These muscles contract in response to loud sounds, thereby reducing the transmission of sound to the inner ear. This is ...
... The movement of the ossicles may be stiffened by two muscles, the stapedius and tensor tympani, which are under the control of the facial nerve and trigeminal nerve, respectively. These muscles contract in response to loud sounds, thereby reducing the transmission of sound to the inner ear. This is ...
Auditory brainstem fact sheet - Central Manchester University
... and improve speech understanding with lipreading. One or two people are able to understand a few words without lipreading when listening with the ABI. The ABI may help to monitor the pitch and loudness of the voice. At first, the new sensation of sound produced by the ABI will be very different from ...
... and improve speech understanding with lipreading. One or two people are able to understand a few words without lipreading when listening with the ABI. The ABI may help to monitor the pitch and loudness of the voice. At first, the new sensation of sound produced by the ABI will be very different from ...
Less Noise City - Sound Hearing 2030
... methods to reduce sound transmission through walls, floors, and ceilings. The first is to install materials with air pockets (e.g., insulation) that trap sound waves; the second is to increase wall thickness. These approaches may work for new construction, but they are difficult and costly to implem ...
... methods to reduce sound transmission through walls, floors, and ceilings. The first is to install materials with air pockets (e.g., insulation) that trap sound waves; the second is to increase wall thickness. These approaches may work for new construction, but they are difficult and costly to implem ...
Fundamentals of Multimedia, Chapter 6
... Merits of dB * The decibel's logarithmic nature means that a very large range of ratios can be represented by a convenient number. This allows one to clearly visualize huge changes of some quantity. * The mathematical properties of logarithms mean that the overall decibel gain of a multi-component s ...
... Merits of dB * The decibel's logarithmic nature means that a very large range of ratios can be represented by a convenient number. This allows one to clearly visualize huge changes of some quantity. * The mathematical properties of logarithms mean that the overall decibel gain of a multi-component s ...
A Simplified Solid Mechanical and Acoustic Model for
... for translating variations in air pressure whether from speech, music or other sources [2] into neural activity for our perception and interpretation of sound. The ear can be divided into main sections such as outer ear, middle ear and inner ear. Each part performs a specific function in processing ...
... for translating variations in air pressure whether from speech, music or other sources [2] into neural activity for our perception and interpretation of sound. The ear can be divided into main sections such as outer ear, middle ear and inner ear. Each part performs a specific function in processing ...
The mechanics of hearing
... The threshold sound stimulus depends on the frequency. Figure 2 shows the auditory threshold curve (or audiogram) for a normal subject. The threshold rises at both lower and higher frequencies. Below about 20 Hz, the sound has to be so intense that it is possible to say that there is no hearing belo ...
... The threshold sound stimulus depends on the frequency. Figure 2 shows the auditory threshold curve (or audiogram) for a normal subject. The threshold rises at both lower and higher frequencies. Below about 20 Hz, the sound has to be so intense that it is possible to say that there is no hearing belo ...
threshold
... • Listen for a probe or target (typically a sinusoid) in a background of a masker with a variety of spectral shapes (typically a noise). • Assume: A listener has independent access to, and can ‘listen’ selectively to the output of an individual auditory filter – the one that will give ...
... • Listen for a probe or target (typically a sinusoid) in a background of a masker with a variety of spectral shapes (typically a noise). • Assume: A listener has independent access to, and can ‘listen’ selectively to the output of an individual auditory filter – the one that will give ...
The Inner Ear: The Basilar Membrane as a Harmonic Oscillator
... Each point of the basilar membrane is modeled as a simple damped harmonic oscillator with mass m(x), damping coefficient r (x), and stiffness (Hooke’s constant) k (x) that vary along the length of the membrane. Let η(x, t) denote the displacement of the membrane at the distance x along the membrane. ...
... Each point of the basilar membrane is modeled as a simple damped harmonic oscillator with mass m(x), damping coefficient r (x), and stiffness (Hooke’s constant) k (x) that vary along the length of the membrane. Let η(x, t) denote the displacement of the membrane at the distance x along the membrane. ...
Incidental sounds of locomotion in animal cognition | SpringerLink
... Birds that fly in organized groups usually do so in line formation or, alternatively, in cluster formation (Gould and Heppner 1974; Lebar Bajec and Heppner 2009). Line formation is typical of large birds such as waterfowl, where birds fly arranged in single lines, often joined together, as in the V- ...
... Birds that fly in organized groups usually do so in line formation or, alternatively, in cluster formation (Gould and Heppner 1974; Lebar Bajec and Heppner 2009). Line formation is typical of large birds such as waterfowl, where birds fly arranged in single lines, often joined together, as in the V- ...
bridget_shield_glossary_
... in the other ear is either the same or lower. Conductive hearing loss Hearing loss caused by a problem in the outer or middle ear, resulting in the inability of sound to be conducted to the inner ear. Congenital hearing loss Hearing loss present from birth. It may or may not be inherited. DeciBel dB ...
... in the other ear is either the same or lower. Conductive hearing loss Hearing loss caused by a problem in the outer or middle ear, resulting in the inability of sound to be conducted to the inner ear. Congenital hearing loss Hearing loss present from birth. It may or may not be inherited. DeciBel dB ...
Audiometry2012-11
... Masking Masking presents a constant noise to the non-test ear to prevent crossover from the test ear. The purpose of masking is to prevent the non-test ear from detecting the signal (line busy), so only the test ear can respond. ...
... Masking Masking presents a constant noise to the non-test ear to prevent crossover from the test ear. The purpose of masking is to prevent the non-test ear from detecting the signal (line busy), so only the test ear can respond. ...
2002 Kastak, D., and Schusterman, R.J. Changes in
... for a terrestrial ear 共Repenning, 1972兲. These changes in underwater sensitivity should directly reflect the degree to which the cavernous tissue is inflated, and therefore, hearing sensitivity in pinnipeds should change with depth. To date, all pinniped auditory thresholds have been obtained in sha ...
... for a terrestrial ear 共Repenning, 1972兲. These changes in underwater sensitivity should directly reflect the degree to which the cavernous tissue is inflated, and therefore, hearing sensitivity in pinnipeds should change with depth. To date, all pinniped auditory thresholds have been obtained in sha ...
Ear The ear provides humans not only the ability to hear, but also
... Ear The ear provides humans not only the ability to hear, but also helps us to maintain a sense of balance. Both functions rely on specialized nerve receptors that respond to sound waves or changes in movement. In Depth: Ear The ears are organs that provide two main functions — hearing and balance — ...
... Ear The ear provides humans not only the ability to hear, but also helps us to maintain a sense of balance. Both functions rely on specialized nerve receptors that respond to sound waves or changes in movement. In Depth: Ear The ears are organs that provide two main functions — hearing and balance — ...
Sudden Deafness Caused by Lifestyle Stress
... both types of cells. The endolymph may be moved by placing pressure on the tympanic membrane. This pressure may be applied by sounds introduced through the ear canal (Fig. 2). The type of sound applied may be white noise, which would stimulate all auditory frequencies at an intensity sufficient to p ...
... both types of cells. The endolymph may be moved by placing pressure on the tympanic membrane. This pressure may be applied by sounds introduced through the ear canal (Fig. 2). The type of sound applied may be white noise, which would stimulate all auditory frequencies at an intensity sufficient to p ...
A Probabilistic Model for Binaural Sound Localization
... sound source to the ears [3]. But this approximation is slightly inaccurate due to arising reflection and diffraction effects by the head, the shoulders, and the external ears, which lead to phase differences dependent on the frequency f [4]. Therefore, the measurement of ITDs is influenced by phase ...
... sound source to the ears [3]. But this approximation is slightly inaccurate due to arising reflection and diffraction effects by the head, the shoulders, and the external ears, which lead to phase differences dependent on the frequency f [4]. Therefore, the measurement of ITDs is influenced by phase ...
Hearing Aids
... hearing aids are programmable, meaning that they can hold separate settings for different listening situations. You can "change the channel" to adjust certain sounds louder or softer, depending on your preferences and hearing loss. They aren't as sensitive as digital hearing aids. ...
... hearing aids are programmable, meaning that they can hold separate settings for different listening situations. You can "change the channel" to adjust certain sounds louder or softer, depending on your preferences and hearing loss. They aren't as sensitive as digital hearing aids. ...
connecting to sound for those left profoundly deaf, an auditory
... good, we can usually get it right first time. With big tumors, the normal anatomical landmarks can be obscured.” At this point, audiologist William Shapiro, AuD, clinical associate professor of otolaryngology, steps in, sending test signals to the electrode paddle. If the paddle is well positioned, ...
... good, we can usually get it right first time. With big tumors, the normal anatomical landmarks can be obscured.” At this point, audiologist William Shapiro, AuD, clinical associate professor of otolaryngology, steps in, sending test signals to the electrode paddle. If the paddle is well positioned, ...
Surgical Treatments for Hearing Loss
... What is this? A metal implant that is surgically placed in the bone above and behind the ear that allows sound to be transmitted through the bone to a functional inner ear. There are different manufacturers of this kind of device, including the Cochlear Baha, Oticon Ponto, and Sophono. Who can get t ...
... What is this? A metal implant that is surgically placed in the bone above and behind the ear that allows sound to be transmitted through the bone to a functional inner ear. There are different manufacturers of this kind of device, including the Cochlear Baha, Oticon Ponto, and Sophono. Who can get t ...
Winter 2010 - Hearing Associates
... goofy Donald Duck voice? It can be explained by understanding how fast sound moves through different objects. The speed of sound is measured by the velocity of a sound through a medium, such as a gas or solid. For example, the speed of sound in air is 768.095 mph at a temperature of 68°F. At sea lev ...
... goofy Donald Duck voice? It can be explained by understanding how fast sound moves through different objects. The speed of sound is measured by the velocity of a sound through a medium, such as a gas or solid. For example, the speed of sound in air is 768.095 mph at a temperature of 68°F. At sea lev ...
Wind farms, sound and health
... For example, a vacuum cleaner may produce a frequency of 125 Hz with a level of 66 dB, and a frequency of 8,000 Hz with a level of 72 dB, with many other frequencies in between. The overall measurement of the level of sound of the vacuum cleaner is 81 dBA.15 Environmental and transportation noise le ...
... For example, a vacuum cleaner may produce a frequency of 125 Hz with a level of 66 dB, and a frequency of 8,000 Hz with a level of 72 dB, with many other frequencies in between. The overall measurement of the level of sound of the vacuum cleaner is 81 dBA.15 Environmental and transportation noise le ...
High-Fidelity Hearing Protection Brochure
... than the lows and mid-range, which produces unnatural, muffled sound. Etymotic’s high-fidelity earplugs reduce sound evenly at all frequencies so sound is unaltered, just quieter. ...
... than the lows and mid-range, which produces unnatural, muffled sound. Etymotic’s high-fidelity earplugs reduce sound evenly at all frequencies so sound is unaltered, just quieter. ...
Artificial cochlear implants Geoff
... Microphone Piezoelectric microphones are typically used. When the piezoelectric material is stressed along one axis ...
... Microphone Piezoelectric microphones are typically used. When the piezoelectric material is stressed along one axis ...
Sound
In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water. In physiology and psychology, sound is the reception of such waves and their perception by the brain.