Acoustic Structures Crying of Infants From 1 to 4 Months and Their Signification (LongCRY)
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|ClinicalTrials.gov Identifier: NCT03716882|
Recruitment Status : Recruiting
First Posted : October 23, 2018
Last Update Posted : October 23, 2018
Crying is a survival mechanism for babies and their almost exclusive means of expression until the age of 4 months. Babies 'cry is mostly related to pain, a feeling of hunger, discomfort or separation following the departure of a parent around. Crying is a complex but essential means of communication and information between a baby and his parents that raises the question of their meaning.
The cry phenomenon consists of complex acoustic signals produced by the vocal cords and filtered by the vocal tract. The vibrations frequency determines the fundamental frequency, itself responsible for the perception of the cry tone (pitch). The frequency spectrum of a cry is modified during the passage through the upper airways forming broad bands called "resonance frequency" or "formants".
From the specificity of a crying sequence, it is possible to extract dynamic information and relate it to the perception that the adult has of it. Thus dynamic crying is often perceived by the adult as an imminent need of the baby.
Some studies have shown that a child's crying may change according to his degree of discomfort, suggesting that crying was a "graduated signal" whose frequency and timbre could vary along a continuum. These changes would explain why adult listeners would be able to dissociate crying babies of different intensities.
Conversely, an inappropriate response to crying could gradually generate disorders of the relationship between the baby and the parent.
However, despite their potential neuro-ethological interest, knowledge of information transmitted by babies's cry remains superficial. This could be related to the relatively obsolete techniques of recording or due to the lack of objective physiological data on babies 'cry. Finally, the perception and reactions of adults when they hear crying babies are not fully understood.
|Condition or disease||Intervention/treatment|
|Infants||Device: Song Meter (SM)4|
|Study Type :||Observational|
|Estimated Enrollment :||26 participants|
|Official Title:||Acoustic Structures Crying of Infants From 1 to 4 Months and Their Signification|
|Actual Study Start Date :||October 16, 2018|
|Estimated Primary Completion Date :||September 2019|
|Estimated Study Completion Date :||December 2019|
Infant at the birth
Infant at the birth will be included. Their cries will be longitudinally registered using an automatic record device: Song Meter (SM)4 during 3 consecutive days and nights.
At every cry, parent should answer the questionnaire of cry in infant.
Device: Song Meter (SM)4
Their cries will be longitudinally registered using an automatic record device: Song Meter (SM)4 during 3 consecutive days and nights. This record will take place at 15 days of life, 1 and half months, 2 and half months and 3 and half months.
Other Name: automatic record device
- Acoustic structures crying of parameters Principal Component 1 (PC1) and Principal Component 2 (PC2) [ Time Frame: up to 3 and half months. ]Comparison of acoustic structures crying of parameters Principal Component 1 (PC1) and Principal Component 2 (PC2) with PRAAT software.
- Questionnaire of cry in infant [ Time Frame: up to 3 and half months. ]At every cry, parent should answer at the questionnaire of cry in infant: context of the crying (situation), how he interpreted it (pain, hunger, discomfort, etc.), actions he undertook to calm the crying (reassurance, lift, change, breastfeeding), and if those they have been effective in comforting the baby.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03716882
|Contact: Hugues PATURAL, PhD||(0)4 77 82 85 42 ext +firstname.lastname@example.org|
|Contact: Margueritte LOCKHART, Student||(0)4 77 82 85 42 ext +email@example.com|
|Principal Investigator: Hugues PATURAL, PhD|
|Study Chair:||Nicolas MATHEVON, PhD||Université Jean MONNET, Saint-Etienne, France|