The common marmoset (Callithrix jacchus), a highly vocal New World primate species, has emerged in recent years as promising animal model for studying brain mechanisms underlying perception, production, and cognition. present study provides quantitative acoustic analysis of large number vocalizations produced by marmosets social environment within captive colony. Previous classifications the repertoire were mostly based on qualitative observations. In variety from individually identified...

The perception of the pitch harmonic complex sounds is a crucial function human audition, especially in music and speech processing. Whether underlying mechanisms are unique to humans, however, unknown. Based on estimates frequency resolution at level auditory periphery, psychoacoustic studies humans have revealed several primary features central mechanisms. It has been shown that (i) strength tone dominated by resolved harmonics; (ii) harmonics sensitive quality spectral harmonicity; (iii)...

Pitch, our perception of how high or low a sound is on musical scale, fundamental perceptual attribute sounds and important for both music speech. After more than century research, the exact mechanisms used by auditory system to extract pitch are still being debated. Theoretically, can be computed using either spectral temporal acoustic features sound. We have investigated cues derived from envelope spectrum an signal extraction in common marmoset (Callithrix jacchus), vocal primate species,...

The common marmoset (Callithrix jacchus) is a small New World primate that has increasingly been used as non-human model in the fields of sensory, motor, and cognitive neuroscience. However, little knowledge exists regarding behavioral methods this species. Developing an understanding neural basis perception cognition animal requires measurement both brain activity behavior. Here we describe operant conditioning training method developed to allow controlled psychoacoustic measurements...

Budgerigars learn their vocalizations by reference to auditory information and they retain the ability new throughout life. Auditory feedback of these was manipulated in three experiments training birds produce while wearing small earphones. Experiments 1 2 examined effect background noise level (Lombard effect) manipulating from self-produced (Fletcher effect), respectively. Results show that exhibit both a Lombard Fletcher effect. Further analysis showed changes vocal intensity were...

Pitch is one of the most fundamental percepts in auditory system and can be extracted using either spectral or temporal information an acoustic signal. Although pitch perception has been extensively studied human subjects, it far less clear how nonhuman primates perceive pitch. We have addressed this question a series behavioral studies which marmosets, vocal primate species, were trained to discriminate complex harmonic tones differing (fundamental frequency [f 0 ]) envelope (repetition...

How humans and animals segregate sensory information into discrete, behaviorally meaningful categories is one of the hallmark questions in neuroscience. Much research around this topic auditory system has centered human speech perception, which categorical processes result an enhanced sensitivity for acoustically differences a reduced nonmeaningful distinctions. less known about whether nonhuman primates process their species-specific vocalizations similar manner. We address question common...

The budgerigar (Melopsittacus undulatus) has an extraordinarily complex, learned, vocal repertoire consisting of both the long rambling warble song males and a number short calls produced by sexes. In warble, most common elements (>30%) bear strong resemblance to highly frequency-modulated, learned contact that birds produce as single utterances. However, aside from this apparent similarity, little else is known about relationship between call elements. Here, types were recorded four...

Budgerigars were trained by operant conditioning to produce contact calls immediately after hearing a stimulus call.In Experiments 1 and 2, playback stimuli chosen from two different call classes the bird's repertoire.Once this task was learned, birds then tested with other probe its repertoire, which differed original drawn classes.Birds failed mimic but instead produced one of as in training sessions, showing that learned each served discriminative not vocal template for imitation.In...

Abstract Budgerigars ( Melopsittacus undulatus ) are small Australian parrots with a well-documented, learned vocal repertoire and high degree of production learning. These birds live in large, social flocks they vocally interact each other dynamic, reciprocal manner. We assume that budgerigars must process integrate wide variety sensory stimuli when selecting appropriate responses to conspecifics during interactions, but the relative contributions these different next impossible tease apart...

ABSTRACT Species-specific vocalizations are behaviorally critical sounds. Similar to faces, species-specific important for the survival and social interactions of both humans vocal animals. Face patches have been found in brains human non-human primates. In humans, a voice patch system has identified on lateral superior temporal gurus (STG) that is selective voices over other primates, while vocalization-selective regions were rostral portion lobe outside auditory cortex macaques marmosets...

There is considerable interest in understanding the mechanisms whereby auditory feedback (AF) enables a bird to learn and produce stable vocal repertoire. In free field, budgerigars (Melopsittacus undulatus) show evidence of Lombard effect, an increase intensity their contact calls presence background noise. They also adjust frequency compensate for pitch-altered AF. Here, we extend these findings using earphones more precisely determine role AF production. Budgerigars were fitted with small...

The budgerigar has an extraordinarily complex, learned, vocal repertoire consisting of both long rambling warble and a number shorter calls produced as single utterances. contact call is the most frequently vocalization by budgerigars, it bears strong resemblance to short (about 150-ms), frequency-modulated elements that make up 25% sounds warble. Using signal processing psychophysical techniques we examined whether these two vocalizations represent different phonological systems or are used...

The most-often produced vocalization of the budgerigar, a small parrot native to Australia, is short (100–150 ms) frequency-modulated contact call. These calls play role in maintaining flock dynamics and are believed act as vocal signatures these birds. Previous findings our lab have shown that budgerigars can control intensity their behavior exhibit robust Lombard effect (Manabe et al., 1998). Recently, we there high degree stereotypy across number acoustic parameters (Osmanski Dooling,...

The perception of the pitch harmonic complex sounds is a crucial function human audition, especially in music and speech processing. Whether underlying mechanisms are unique to humans, however, unknown. Based on estimates frequency resolution at level auditory periphery, psychoacoustic studies humans have revealed several primary features central mechanisms. It has been shown that (1) strength tone dominated by resolved harmonics; (2) harmonics sensitive quality spectral harmonicity; (3)...

Auditory processing of complex broadband sounds known as moving ripples has been studied both physiologically at the cortical level in mammals and psychophysically humans [Depireux et al. (2001); Chi (1999)]. These stimuli share spectro-temporal properties with many natural sounds, including species-specific vocalizations formant transitions human speech [Versnel Shamma (1998)]. One test generality ripple beyond would be to examine a non-mammalian species. Zebra finches may excellent...