Evidence map›Paper›PMID 31344973›Full record

ArticleInternational journal of environmental research and public health2019

Physiological and Psychological Effects of Forest and Urban Sounds Using High-Resolution Sound Sources.

Hyunju Jo, Chorong Song, Harumi Ikei, Seiya Enomoto, Hiromitsu Kobayashi, Yoshifumi Miyazaki

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in International journal of environmental research and public health, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 2 pooled it
11.8field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 2 syntheses or guidelines pooled it, 82 citations in OpenAlex.

  1. Pooled it
  2. Effect of Forest Therapy on Depression and Anxiety: A Systematic Review and Meta-Analysis.International journal of environmental research and public health · 2021
    Pooled it
  3. Trial
  4. Smelling Wellness: Associations Between Botanic Garden Scentscapes and Human Health Gains.International journal of environmental research and public health · 2026
    Trial
  5. Trial
  6. Trial
  7. Trial
  8. Effects of Urban Forest Therapy Program on Depression Patients.International journal of environmental research and public health · 2022
    Trial
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Hyunju JoCenter for Environment, Health and Field Sciences, Chiba University, 6-2-1 Kashiwa-no-ha, Kashiwa, Chiba 277-0882, Japan.
Chorong SongCenter for Environment, Health and Field Sciences, Chiba University, 6-2-1 Kashiwa-no-ha, Kashiwa, Chiba 277-0882, Japan.
Harumi IkeiDepartment of Wood Engineering, Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan.
Seiya EnomotoJVCKENWOOD Victor Entertainment Corporation, 1-2-20 Higashi, Shibuya-ku, Tokyo 150-0011, Japan.
Hiromitsu KobayashiDepartment of Nursing, Ishikawa Prefectural Nursing University, 1-1 Gakuendai, Kahoku, Ishikawa 929-1210, Japan.
Yoshifumi MiyazakiCenter for Environment, Health and Field Sciences, Chiba University, 6-2-1 Kashiwa-no-ha, Kashiwa, Chiba 277-0882, Japan. ymiyazaki@faculty.chiba-u.jp.
Chiba University · JPForestry and Forest Products Research Institute · JPIshikawa Prefectural Nursing University · JPJVC Kenwood (Japan) · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Exposure to natural sounds is known to induce feelings of relaxation; however, only few studies have provided scientific evidence on its physiological effects. This study examined prefrontal cortex and autonomic nervous activities in response to forest sound. A total of 29 female university students (mean age 22.3 ± 2.1 years) were exposed to high-resolution sounds of a forest or city for 60 s, using headphones. Oxyhemoglobin (oxy-Hb) concentrations in the prefrontal cortex were determined by near-infrared spectroscopy. Heart rate, the high-frequency component of heart rate variability (which reflects parasympathetic nervous activity), and the ratio of low-frequency to high-frequency (LF/HF) components (which reflects sympathetic nervous activity) were measured. Subjective evaluation was performed using the modified semantic differential method and profiles of mood states. Exposure to the forest sound resulted in the following significant differences compared with exposure to city sound: decreased oxy-Hb concentrations in the right prefrontal cortex; decreased ln(LF/HF); decreased heart rate; improved feelings described as "comfortable,'' "relaxed," and "natural"; and improved mood states. The findings of this study demonstrated that forest-derived auditory stimulation induced physiological and psychological relaxation effects.

Indexed as

ForestsRelaxationSoundAdultAutonomic Nervous SystemCitiesEmotionsFemaleHeart RateHumansOxyhemoglobinsPrefrontal CortexYoung AdultOxyhemoglobinsautonomic nervous activityforest soundheart rateheart rate variabilitynatural soundnear-infrared spectroscopyphysiological relaxation effectsprefrontal cortex activityprofile of mood statessemantic differential method

Identifiers

PMID31344973
PMCPMC6695879
OpenAlexW2962886113

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.