Roughly 80% of the fundamental frequencies of their communication calls are found in the frequency range above 20kHz. However, thresholds for frequencies above 20kHz have been reported higher than those for low frequencies (from 1kHz to 16kHz) by as much as 20dB. We examined how gerbils ...
38-40. Francis Galton contributed to geography, anthropology, genetics, and statistics as well as to psychology. In the passages reproduced he tells of his invention of a simple instrument for testing sensitivity of sounds of high frequency, and of its application to man and to several species ...
Interaural temporal disparities (ITDs) are a cue for localization of sounds along the azimuth. Listeners can detect ITDs in the fine structure of low-frequency sounds and also in the envelopes of high-frequency sounds. Sensitivity to ITDs originates in the main nuclei of the superior olivary...
Even if we avoid exposure to very loud noise, the ear's outer hair cells may also simply wear out as we age, leading to age related hearing loss. In this condition, high frequency outer hair cells tend to die off before low-frequency ones, possibly because the high frequency outer hair...
Sounds below 20 Hz are known as infrasonic sounds and those above 20000 Hz are called ultrasonic sounds. While purchasing a headphone/earphone, it’s in your best interest to make sure it covers this frequency response range. There are headphones and earphones which specify frequency response ran...
Hence, it appears that two distinct sensory systems mediate vibrotactile sensitivity: a high-frequency mechanism based upon the response of Pacinian corpuscles located deep within the dermal layer and a slower non-Pacinian system (Kenshalo, 1979). Verrillo (1980) examined vibrotactile sensitivity as ...
Human listeners are sensitive to interaural time differences (ITDs) in the envelopes of sounds, which can serve as a cue for sound localization. Many high-frequency neurons in the mammalian inferior colliculus (IC) are sensitive to envelope-ITDs of sinusoidally amplitude-modulated (SAM) sounds. ...
The frequency of sounds is coded partly by phase locking to the temporal fine structure (TFS) of the waveform evoked on the basilar membrane. On the basis of data obtained using sinusoids, it is usually assumed that in mammals, including humans, TFS information becomes unusable for frequencies ...
Microphone - A microphone placed inside the ear cup "listens" to external sounds that cannot be blocked passively. Noise-canceling circuitry - Electronics, also placed in the ear cup, sense the input from the microphone and generate a "fingerprint" of the noise, noting the frequency and amplitu...
In the current study, frequency information was not provided, though high sensitivity to TIDs was shown for both low and high frequency tactile stimulation. Further work is required to optimise this approach to maximise the benefit of haptic stimulation for separating sound sources. As well as ...