when a young infant hears the same sound over and over such as ba-ba-ba- what will happen
Phonological development Reduplicated babbling contains consonant-vowel (CV) syllables that are repeated in reduplicated series of the same consonant and vowel (e.g., [bababa]). At this stage, infants’ productions resemble speech much more closely in timing and vocal behaviors than at earlier stages. Starting around 6 months babies also show an influence of the ambient language in their babbling, i.e., babies’ babbling sounds different depending on which languages they hear. For example, French learning 9-10 month-olds have been found to produce a bigger proportion of prevoiced stops (which exist in French but not English) in their babbling than English learning infants of the same age.[19] This phenomenon of babbling being influenced by the language being acquired has been called babbling drift.[20]
Heart sounds In healthy adults, there are two normal heart sounds, often described as a lub and a dub (or dup), that occur in sequence with each heartbeat. These are the first heart sound (S1) and second heart sound (S2), produced by the closing of the atrioventricular valves and semilunar valves, respectively. In addition to these normal sounds, a variety of other sounds may be present including heart murmurs, adventitious sounds, and gallop rhythms S3 and S4.