ゾウは人間の耳に聞こえないほど低い音を使って会話することが知られている。低いけれどとても強い声を使って10キロ離れた相手ともコミュニケーションできるといわれている。2004年12月におきたインド洋大津波では、ゾウたちが津波を事前に察知して集団で高台に移動するという出来事が話題を集めた。実は、ゾウが津波の襲来を予知したのも、この不思議な音をキャッチする能力に関係があると考えられている。
私たちの身の回りの超低周波音についてはいくつかの研究がある。例えば、超低周波地震を観測することで、地殻の運動を解明する研究が進んでいる。また、機械が発生する超低周波については健康に及ぼす影響という観点から調べられている。
| Query | Error | Affected | Num. rows | Took (ms) | Actions |
|---|---|---|---|---|---|
| SELECT `Content`.`id`, `Content`.`user_id`, `Content`.`last_edit_user_id`, `Content`.`post_date`, `Content`.`post_date_year`, `Content`.`post_date_month`, `Content`.`post_date_day`, `Content`.`title`, `Content`.`title_en`, `Content`.`content`, `Content`.`plain_content`, `Content`.`page_view`, `Content`.`flag`, `Content`.`mod_count`, `Content`.`created`, `Content`.`modified` FROM `contents` AS `Content` WHERE `id` = 168 LIMIT 1 | 1 | 1 | 0 | ||
| SELECT `Attachment`.`file_name`, `Attachment`.`dir`, `Attachment`.`model`, `Attachment`.`foreign_key` FROM `attachments` AS `Attachment` WHERE `file_name` <> 'default.jpg' AND `Attachment`.`foreign_key` = (168) | 1 | 1 | 0 | ||
| SELECT `ContentsRelatedItem`.`content`, `ContentsRelatedItem`.`related_item_id`, `ContentsRelatedItem`.`content_id` FROM `contents_related_items` AS `ContentsRelatedItem` WHERE `ContentsRelatedItem`.`content_id` = (168) | 11 | 11 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 1 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 2 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 4 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 6 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 7 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 8 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 9 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 9 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 9 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 11 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 12 | 1 | 1 | 0 | ||
| SELECT `ContentsTag`.`id`, `ContentsTag`.`tag_group_id`, `ContentsTag`.`mod_count`, `ContentsTag`.`tag_id`, `ContentsTag`.`content_id` FROM `contents_tags` AS `ContentsTag` WHERE `ContentsTag`.`content_id` = (168) | 2 | 2 | 0 | ||
| SELECT `Tag`.`name`, `Tag`.`comment`, `Tag`.`tag_group_id` FROM `tags` AS `Tag` WHERE `Tag`.`id` = 26 | 1 | 1 | 0 | ||
| SELECT `TagGroup`.`code`, `TagGroup`.`name` FROM `tag_groups` AS `TagGroup` WHERE `TagGroup`.`id` = 2 | 1 | 1 | 0 | ||
| SELECT `Tag`.`name`, `Tag`.`comment`, `Tag`.`tag_group_id` FROM `tags` AS `Tag` WHERE `Tag`.`id` = 92 | 1 | 1 | 0 | ||
| SELECT `TagGroup`.`code`, `TagGroup`.`name` FROM `tag_groups` AS `TagGroup` WHERE `TagGroup`.`id` = 7 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`id`, `RelatedItem`.`code`, `RelatedItem`.`name`, `RelatedItem`.`created`, `RelatedItem`.`modified`, `RelatedItem`.`flag` FROM `related_items` AS `RelatedItem` WHERE `code` = 'function' LIMIT 1 | 1 | 1 | 0 | ||
| SELECT `Content`.`id`, `Content`.`title`, `Content`.`title_en` FROM `contents` AS `Content` WHERE id = (NULL) ORDER BY `id` desc | 0 | 0 | 0 |
Peak Memory Use 8.93 MB
| Message | Memory use |
|---|---|
| Component intitailization | 6.78 MB |
| Controller action start | 6.81 MB |
| Controller render start | 6.89 MB |
| View render complete | 7.91 MB |
Total Request Time: 201 (ms)
| Message | Time in ms | Graph |
|---|---|---|
| Core Processing (Derived) | 78.79 | |
| Component initialization and startup | 6.86 | |
| Controller action | 13.66 | |
| Render Controller Action | 22.80 | |
| » Rendering View | 20.92 | |
| » » Rendering APP/views/contents/view.ctp | 10.12 | |
| » » Rendering APP/views/layouts/default.ctp | 9.35 | |
| » » » Rendering APP/views/elements/header.ctp | 0.70 | |
| » » » Rendering APP/views/elements/content_sidebar.ctp | 0.20 | |
| » » » Rendering APP/views/elements/footer.ctp | 0.18 |
