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

NCT ID: NCT03716882

Last Updated: 2021-02-01

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 25 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2018-10-16
• Study Completion Date: 2020-01-06

Brief 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.

Detailed 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.

Conditions

Infants

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

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.

Song Meter (SM)4

Intervention Type: DEVICE

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.

Interventions

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.

Intervention Type: DEVICE

Other Intervention Names

automatic record device

Eligibility Criteria

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

• Minimum Eligible Age: 1 Day
• Maximum Eligible Age: 10 Weeks
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

ENES, CNRS 9197

UNKNOWN

Sponsor Role: collaborator

Centre Hospitalier Universitaire de Saint Etienne

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Nicolas MATHEVON, PhD

Role: STUDY_CHAIR

Université Jean MONNET, Saint-Etienne, France

Locations

Chu Saint-Etienne

Saint-Etienne, , France

Countries

France

Other Identifiers

2018-A01399-46

Identifier Type: OTHER

Identifier Source: secondary_id

18CH085

Identifier Type: -

Identifier Source: org_study_id