Acoustic Structures Crying of Infants From 1 to 4 Months and Their Signification

Infants Clinical Trial

— LongCRY  

Official title:

Acoustic Structures Crying of Infants From 1 to 4 Months and Their Signification

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03716882
• Other study ID #: 18CH085
• Secondary ID: 2018-A01399-46
• Status: Completed
• Start date: October 16, 2018
• Est. completion date: January 6, 2020

Study information

• Verified date: January 2021
• Source: Centre Hospitalier Universitaire de Saint Etienne
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

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.

Description:

The objective of this study is to evaluate acoustic structures crying of infants from 1 to 4 months for to study individual acoustic signature.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 25
• Est. completion date: January 6, 2020
• Est. primary completion date: January 6, 2020
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: N/A to 10 Weeks

Eligibility

Inclusion Criteria:

• any safe term infants (> 37SA)

• eutrophic and in good health

• infants sleeping in bed with bars without baby nest

• form signed by the holder of parental authority.

• Parents affiliated to a social security scheme

• Parents who to live in cities of Saint-Etienne, Villars, Saint Priest-en-Jarez, Etrat and Saint Jean-Bonnefonds, France

Exclusion Criteria:

• inter-uterine growth restriction

• antenatal neurological pathologies or at birth

• perinatal asphyxial encephalopathy

• antenatal pathologies (e.g. trisomy 21, hydrocephalus...)

• multiple pregnancy

Related Conditions & MeSH terms

• Infants

Intervention

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.

Locations

Country	Name	City	State
France	Chu Saint-Etienne	Saint-Étienne

Sponsors (2)

Lead Sponsor	Collaborator
Centre Hospitalier Universitaire de Saint Etienne	ENES, CNRS 9197

Country where clinical trial is conducted

France, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Acoustic structures crying of parameters Principal Component 1 (PC1) and Principal Component 2 (PC2)	Comparison of acoustic structures crying of parameters Principal Component 1 (PC1) and Principal Component 2 (PC2) with PRAAT software.	up to 3 and half months.
Secondary	Questionnaire of cry in infant	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.	up to 3 and half months.