Components

5 Twig Components
11 Render Count
28 ms Render Time
146.0 MiB Memory Usage

Components

Name Metadata Render Count Render Time
ProductCard
"App\Twig\Components\ProductCard"
components/ProductCard.html.twig
3 23.35ms
ProductState
"App\Twig\Components\ProductState"
components/ProductState.html.twig
3 0.61ms
ProductMostRecent
"App\Twig\Components\ProductMostRecent"
components/ProductMostRecent.html.twig
3 2.14ms
PageBanner
"App\Twig\Components\PageBanner"
components/PageBanner.html.twig
1 4.52ms
BackButton
"App\Twig\Components\BackButton"
components/BackButton.html.twig
1 0.22ms

Render calls

PageBanner App\Twig\Components\PageBanner 146.0 MiB 4.52 ms
Input props
[
  "backLabel" => "17.140 : Acoustics and acoustic measurements"
  "backUrl" => "/taxons/main/ics-2277/17-metrology-and-measurement-physical-phenomena-4253/17-140-acoustics-and-acoustic-measurements-4481"
  "paddingClasses" => "p-2 px-lg-5 py-lg-0"
  "searchPlaceholder" => "sylius.ui.search"
  "showSearch" => "true"
  "title" => "17.140.01 : Acoustic measurements and noise abatement in general"
]
Attributes
[]
Component
App\Twig\Components\PageBanner {#94263
  +supTitle: null
  +title: "17.140.01 : Acoustic measurements and noise abatement in general"
  +subTitle: null
  +backUrl: "/taxons/main/ics-2277/17-metrology-and-measurement-physical-phenomena-4253/17-140-acoustics-and-acoustic-measurements-4481"
  +backLabel: "17.140 : Acoustics and acoustic measurements"
  +customClasses: null
  +backgroundType: null
  +centered: true
  +showSearch: true
  +searchPlaceholder: "sylius.ui.search"
  +searchValue: null
  +paddingClasses: "p-2 px-lg-5 py-lg-0"
}
BackButton App\Twig\Components\BackButton 146.0 MiB 0.22 ms
Input props
[
  "url" => "/taxons/main/ics-2277/17-metrology-and-measurement-physical-phenomena-4253/17-140-acoustics-and-acoustic-measurements-4481"
  "label" => "17.140 : Acoustics and acoustic measurements"
]
Attributes
[]
Component
App\Twig\Components\BackButton {#94365
  +label: "17.140 : Acoustics and acoustic measurements"
  +url: "/taxons/main/ics-2277/17-metrology-and-measurement-physical-phenomena-4253/17-140-acoustics-and-acoustic-measurements-4481"
}
ProductCard App\Twig\Components\ProductCard 146.0 MiB 10.70 ms
Input props
[
  "product" => App\Entity\Product\Product {#94879
    #id: 8418
    #code: "IEEE00000445"
    #attributes: Doctrine\ORM\PersistentCollection {#94942 …}
    #variants: Doctrine\ORM\PersistentCollection {#94940 …}
    #options: Doctrine\ORM\PersistentCollection {#94936 …}
    #associations: Doctrine\ORM\PersistentCollection {#94938 …}
    #createdAt: DateTime @1751037400 {#94874
      date: 2025-06-27 17:16:40.0 Europe/Paris (+02:00)
    }
    #updatedAt: DateTime @1754606304 {#94881
      date: 2025-08-08 00:38:24.0 Europe/Paris (+02:00)
    }
    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#94952 …}
    #translationsCache: [
      "en_US" => App\Entity\Product\ProductTranslation {#95110
        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#94879}
        #id: 28681
        #name: "IEEE 260.4:1996 (R2008)"
        #slug: "ieee-260-4-1996-r2008-ieee00000445-240070"
        #description: """
          New IEEE Standard - Superseded.<br />\n
          Reaffirmed 2008. Letter symbols for physical quantities used in the science and technology of acoustics are covered. Abbreviations for a number of acoustical levels and related measures that are in common use are also given. The symbols given in this standard are intended for all applications.<br />\n
          \t\t\t\t<br />\n
          To establish a standard set of letter symbols for quantities used in the science and technology of acoustics: also to establish standard abbreviations for a number of acoustical levels and related measures that are in common use. The science and technology of acoustics include sound, ultrasound, and infrasound in all media: gases, especially air; liquids, especially water; and solids are examples of media with which acoustics is concerned. There are many specialties in acoustics, a few of which are: speech, hearing, music, noise control, vibration, shock, and sonar.<br />\n
          To clarify the technical literature of acoustics by providing a standard set of letter symbols for use in mathematical formulations, and a standard set of abbreviations for use in text, especially in tabulations and on graphs; also to encourage the treatment of levels according to the standard rules for all quantities and units; and also to clarify the basic differences among quantity symbols, unit symbols, and abbreviations. This project is a revision of ANSI/IEEE Y10.11(1984).
          """
        #metaKeywords: null
        #metaDescription: null
        #shortDescription: "American National Standard Letter Symbols and Abbreviations for Quantities Used in Acoustics"
        -notes: "Superseded"
      }
    ]
    #currentLocale: "en_US"
    #currentTranslation: null
    #fallbackLocale: "en_US"
    #variantSelectionMethod: "match"
    #productTaxons: Doctrine\ORM\PersistentCollection {#94950 …}
    #channels: Doctrine\ORM\PersistentCollection {#94944 …}
    #mainTaxon: App\Entity\Taxonomy\Taxon {#8840 …}
    #reviews: Doctrine\ORM\PersistentCollection {#94948 …}
    #averageRating: 0.0
    #images: Doctrine\ORM\PersistentCollection {#94946 …}
    -supplier: Proxies\__CG__\App\Entity\Supplier\Supplier {#94959 …}
    -subscriptionCollections: Doctrine\ORM\PersistentCollection {#94958 …}
    -apiLastModifiedAt: DateTime @1754517600 {#94888
      date: 2025-08-07 00:00:00.0 Europe/Paris (+02:00)
    }
    -lastUpdatedAt: DateTime @1578006000 {#94893
      date: 2020-01-03 00:00:00.0 Europe/Paris (+01:00)
    }
    -author: ""
    -publishedAt: DateTime @817686000 {#94890
      date: 1995-11-30 00:00:00.0 Europe/Paris (+01:00)
    }
    -releasedAt: null
    -confirmedAt: DateTime @1206572400 {#94887
      date: 2008-03-27 00:00:00.0 Europe/Paris (+01:00)
    }
    -canceledAt: null
    -edition: null
    -coreDocument: "260.4"
    -bookCollection: ""
    -pageCount: 72
    -documents: Doctrine\ORM\PersistentCollection {#94956 …}
    -favorites: Doctrine\ORM\PersistentCollection {#94954 …}
  }
  "layout" => "vertical"
  "showPrice" => true
  "showStatusBadges" => true
  "imageFilter" => "product_listing_thumbnail"
  "additionalClasses" => "h-100 border-0"
  "hasStretchedLink" => true
  "backgroundColor" => "white"
  "hoverType" => "border-black"
]
Attributes
[]
Component
App\Twig\Components\ProductCard {#95017
  +product: App\Entity\Product\Product {#94879
    #id: 8418
    #code: "IEEE00000445"
    #attributes: Doctrine\ORM\PersistentCollection {#94942 …}
    #variants: Doctrine\ORM\PersistentCollection {#94940 …}
    #options: Doctrine\ORM\PersistentCollection {#94936 …}
    #associations: Doctrine\ORM\PersistentCollection {#94938 …}
    #createdAt: DateTime @1751037400 {#94874
      date: 2025-06-27 17:16:40.0 Europe/Paris (+02:00)
    }
    #updatedAt: DateTime @1754606304 {#94881
      date: 2025-08-08 00:38:24.0 Europe/Paris (+02:00)
    }
    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#94952 …}
    #translationsCache: [
      "en_US" => App\Entity\Product\ProductTranslation {#95110
        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#94879}
        #id: 28681
        #name: "IEEE 260.4:1996 (R2008)"
        #slug: "ieee-260-4-1996-r2008-ieee00000445-240070"
        #description: """
          New IEEE Standard - Superseded.<br />\n
          Reaffirmed 2008. Letter symbols for physical quantities used in the science and technology of acoustics are covered. Abbreviations for a number of acoustical levels and related measures that are in common use are also given. The symbols given in this standard are intended for all applications.<br />\n
          \t\t\t\t<br />\n
          To establish a standard set of letter symbols for quantities used in the science and technology of acoustics: also to establish standard abbreviations for a number of acoustical levels and related measures that are in common use. The science and technology of acoustics include sound, ultrasound, and infrasound in all media: gases, especially air; liquids, especially water; and solids are examples of media with which acoustics is concerned. There are many specialties in acoustics, a few of which are: speech, hearing, music, noise control, vibration, shock, and sonar.<br />\n
          To clarify the technical literature of acoustics by providing a standard set of letter symbols for use in mathematical formulations, and a standard set of abbreviations for use in text, especially in tabulations and on graphs; also to encourage the treatment of levels according to the standard rules for all quantities and units; and also to clarify the basic differences among quantity symbols, unit symbols, and abbreviations. This project is a revision of ANSI/IEEE Y10.11(1984).
          """
        #metaKeywords: null
        #metaDescription: null
        #shortDescription: "American National Standard Letter Symbols and Abbreviations for Quantities Used in Acoustics"
        -notes: "Superseded"
      }
    ]
    #currentLocale: "en_US"
    #currentTranslation: null
    #fallbackLocale: "en_US"
    #variantSelectionMethod: "match"
    #productTaxons: Doctrine\ORM\PersistentCollection {#94950 …}
    #channels: Doctrine\ORM\PersistentCollection {#94944 …}
    #mainTaxon: App\Entity\Taxonomy\Taxon {#8840 …}
    #reviews: Doctrine\ORM\PersistentCollection {#94948 …}
    #averageRating: 0.0
    #images: Doctrine\ORM\PersistentCollection {#94946 …}
    -supplier: Proxies\__CG__\App\Entity\Supplier\Supplier {#94959 …}
    -subscriptionCollections: Doctrine\ORM\PersistentCollection {#94958 …}
    -apiLastModifiedAt: DateTime @1754517600 {#94888
      date: 2025-08-07 00:00:00.0 Europe/Paris (+02:00)
    }
    -lastUpdatedAt: DateTime @1578006000 {#94893
      date: 2020-01-03 00:00:00.0 Europe/Paris (+01:00)
    }
    -author: ""
    -publishedAt: DateTime @817686000 {#94890
      date: 1995-11-30 00:00:00.0 Europe/Paris (+01:00)
    }
    -releasedAt: null
    -confirmedAt: DateTime @1206572400 {#94887
      date: 2008-03-27 00:00:00.0 Europe/Paris (+01:00)
    }
    -canceledAt: null
    -edition: null
    -coreDocument: "260.4"
    -bookCollection: ""
    -pageCount: 72
    -documents: Doctrine\ORM\PersistentCollection {#94956 …}
    -favorites: Doctrine\ORM\PersistentCollection {#94954 …}
  }
  +layout: "vertical"
  +showPrice: true
  +showStatusBadges: true
  +additionalClasses: "h-100 border-0"
  +linkLabel: ""
  +imageFilter: "product_listing_thumbnail"
  +hasStretchedLink: true
  +backgroundColor: "white"
  +hoverType: "border-black"
}
ProductState App\Twig\Components\ProductState 146.0 MiB 0.31 ms
Input props
[
  "product" => App\Entity\Product\Product {#94879
    #id: 8418
    #code: "IEEE00000445"
    #attributes: Doctrine\ORM\PersistentCollection {#94942 …}
    #variants: Doctrine\ORM\PersistentCollection {#94940 …}
    #options: Doctrine\ORM\PersistentCollection {#94936 …}
    #associations: Doctrine\ORM\PersistentCollection {#94938 …}
    #createdAt: DateTime @1751037400 {#94874
      date: 2025-06-27 17:16:40.0 Europe/Paris (+02:00)
    }
    #updatedAt: DateTime @1754606304 {#94881
      date: 2025-08-08 00:38:24.0 Europe/Paris (+02:00)
    }
    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#94952 …}
    #translationsCache: [
      "en_US" => App\Entity\Product\ProductTranslation {#95110
        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#94879}
        #id: 28681
        #name: "IEEE 260.4:1996 (R2008)"
        #slug: "ieee-260-4-1996-r2008-ieee00000445-240070"
        #description: """
          New IEEE Standard - Superseded.<br />\n
          Reaffirmed 2008. Letter symbols for physical quantities used in the science and technology of acoustics are covered. Abbreviations for a number of acoustical levels and related measures that are in common use are also given. The symbols given in this standard are intended for all applications.<br />\n
          \t\t\t\t<br />\n
          To establish a standard set of letter symbols for quantities used in the science and technology of acoustics: also to establish standard abbreviations for a number of acoustical levels and related measures that are in common use. The science and technology of acoustics include sound, ultrasound, and infrasound in all media: gases, especially air; liquids, especially water; and solids are examples of media with which acoustics is concerned. There are many specialties in acoustics, a few of which are: speech, hearing, music, noise control, vibration, shock, and sonar.<br />\n
          To clarify the technical literature of acoustics by providing a standard set of letter symbols for use in mathematical formulations, and a standard set of abbreviations for use in text, especially in tabulations and on graphs; also to encourage the treatment of levels according to the standard rules for all quantities and units; and also to clarify the basic differences among quantity symbols, unit symbols, and abbreviations. This project is a revision of ANSI/IEEE Y10.11(1984).
          """
        #metaKeywords: null
        #metaDescription: null
        #shortDescription: "American National Standard Letter Symbols and Abbreviations for Quantities Used in Acoustics"
        -notes: "Superseded"
      }
    ]
    #currentLocale: "en_US"
    #currentTranslation: null
    #fallbackLocale: "en_US"
    #variantSelectionMethod: "match"
    #productTaxons: Doctrine\ORM\PersistentCollection {#94950 …}
    #channels: Doctrine\ORM\PersistentCollection {#94944 …}
    #mainTaxon: App\Entity\Taxonomy\Taxon {#8840 …}
    #reviews: Doctrine\ORM\PersistentCollection {#94948 …}
    #averageRating: 0.0
    #images: Doctrine\ORM\PersistentCollection {#94946 …}
    -supplier: Proxies\__CG__\App\Entity\Supplier\Supplier {#94959 …}
    -subscriptionCollections: Doctrine\ORM\PersistentCollection {#94958 …}
    -apiLastModifiedAt: DateTime @1754517600 {#94888
      date: 2025-08-07 00:00:00.0 Europe/Paris (+02:00)
    }
    -lastUpdatedAt: DateTime @1578006000 {#94893
      date: 2020-01-03 00:00:00.0 Europe/Paris (+01:00)
    }
    -author: ""
    -publishedAt: DateTime @817686000 {#94890
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    }
    -releasedAt: null
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    }
    -canceledAt: null
    -edition: null
    -coreDocument: "260.4"
    -bookCollection: ""
    -pageCount: 72
    -documents: Doctrine\ORM\PersistentCollection {#94956 …}
    -favorites: Doctrine\ORM\PersistentCollection {#94954 …}
  }
]
Attributes
[
  "showFullLabel" => false
]
Component
App\Twig\Components\ProductState {#95117
  +product: App\Entity\Product\Product {#94879
    #id: 8418
    #code: "IEEE00000445"
    #attributes: Doctrine\ORM\PersistentCollection {#94942 …}
    #variants: Doctrine\ORM\PersistentCollection {#94940 …}
    #options: Doctrine\ORM\PersistentCollection {#94936 …}
    #associations: Doctrine\ORM\PersistentCollection {#94938 …}
    #createdAt: DateTime @1751037400 {#94874
      date: 2025-06-27 17:16:40.0 Europe/Paris (+02:00)
    }
    #updatedAt: DateTime @1754606304 {#94881
      date: 2025-08-08 00:38:24.0 Europe/Paris (+02:00)
    }
    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#94952 …}
    #translationsCache: [
      "en_US" => App\Entity\Product\ProductTranslation {#95110
        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#94879}
        #id: 28681
        #name: "IEEE 260.4:1996 (R2008)"
        #slug: "ieee-260-4-1996-r2008-ieee00000445-240070"
        #description: """
          New IEEE Standard - Superseded.<br />\n
          Reaffirmed 2008. Letter symbols for physical quantities used in the science and technology of acoustics are covered. Abbreviations for a number of acoustical levels and related measures that are in common use are also given. The symbols given in this standard are intended for all applications.<br />\n
          \t\t\t\t<br />\n
          To establish a standard set of letter symbols for quantities used in the science and technology of acoustics: also to establish standard abbreviations for a number of acoustical levels and related measures that are in common use. The science and technology of acoustics include sound, ultrasound, and infrasound in all media: gases, especially air; liquids, especially water; and solids are examples of media with which acoustics is concerned. There are many specialties in acoustics, a few of which are: speech, hearing, music, noise control, vibration, shock, and sonar.<br />\n
          To clarify the technical literature of acoustics by providing a standard set of letter symbols for use in mathematical formulations, and a standard set of abbreviations for use in text, especially in tabulations and on graphs; also to encourage the treatment of levels according to the standard rules for all quantities and units; and also to clarify the basic differences among quantity symbols, unit symbols, and abbreviations. This project is a revision of ANSI/IEEE Y10.11(1984).
          """
        #metaKeywords: null
        #metaDescription: null
        #shortDescription: "American National Standard Letter Symbols and Abbreviations for Quantities Used in Acoustics"
        -notes: "Superseded"
      }
    ]
    #currentLocale: "en_US"
    #currentTranslation: null
    #fallbackLocale: "en_US"
    #variantSelectionMethod: "match"
    #productTaxons: Doctrine\ORM\PersistentCollection {#94950 …}
    #channels: Doctrine\ORM\PersistentCollection {#94944 …}
    #mainTaxon: App\Entity\Taxonomy\Taxon {#8840 …}
    #reviews: Doctrine\ORM\PersistentCollection {#94948 …}
    #averageRating: 0.0
    #images: Doctrine\ORM\PersistentCollection {#94946 …}
    -supplier: Proxies\__CG__\App\Entity\Supplier\Supplier {#94959 …}
    -subscriptionCollections: Doctrine\ORM\PersistentCollection {#94958 …}
    -apiLastModifiedAt: DateTime @1754517600 {#94888
      date: 2025-08-07 00:00:00.0 Europe/Paris (+02:00)
    }
    -lastUpdatedAt: DateTime @1578006000 {#94893
      date: 2020-01-03 00:00:00.0 Europe/Paris (+01:00)
    }
    -author: ""
    -publishedAt: DateTime @817686000 {#94890
      date: 1995-11-30 00:00:00.0 Europe/Paris (+01:00)
    }
    -releasedAt: null
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      date: 2008-03-27 00:00:00.0 Europe/Paris (+01:00)
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    -canceledAt: null
    -edition: null
    -coreDocument: "260.4"
    -bookCollection: ""
    -pageCount: 72
    -documents: Doctrine\ORM\PersistentCollection {#94956 …}
    -favorites: Doctrine\ORM\PersistentCollection {#94954 …}
  }
  +appearance: "state-suspended"
  +labels: [
    "Superseded"
  ]
  -stateAttributeCode: "state"
  -localeContext: Sylius\Component\Locale\Context\CompositeLocaleContext {#1833 …}
}
ProductMostRecent App\Twig\Components\ProductMostRecent 146.0 MiB 0.96 ms
Input props
[
  "product" => App\Entity\Product\Product {#94879
    #id: 8418
    #code: "IEEE00000445"
    #attributes: Doctrine\ORM\PersistentCollection {#94942 …}
    #variants: Doctrine\ORM\PersistentCollection {#94940 …}
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      date: 2025-08-08 00:38:24.0 Europe/Paris (+02:00)
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    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#94952 …}
    #translationsCache: [
      "en_US" => App\Entity\Product\ProductTranslation {#95110
        #locale: "en_US"
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        #id: 28681
        #name: "IEEE 260.4:1996 (R2008)"
        #slug: "ieee-260-4-1996-r2008-ieee00000445-240070"
        #description: """
          New IEEE Standard - Superseded.<br />\n
          Reaffirmed 2008. Letter symbols for physical quantities used in the science and technology of acoustics are covered. Abbreviations for a number of acoustical levels and related measures that are in common use are also given. The symbols given in this standard are intended for all applications.<br />\n
          \t\t\t\t<br />\n
          To establish a standard set of letter symbols for quantities used in the science and technology of acoustics: also to establish standard abbreviations for a number of acoustical levels and related measures that are in common use. The science and technology of acoustics include sound, ultrasound, and infrasound in all media: gases, especially air; liquids, especially water; and solids are examples of media with which acoustics is concerned. There are many specialties in acoustics, a few of which are: speech, hearing, music, noise control, vibration, shock, and sonar.<br />\n
          To clarify the technical literature of acoustics by providing a standard set of letter symbols for use in mathematical formulations, and a standard set of abbreviations for use in text, especially in tabulations and on graphs; also to encourage the treatment of levels according to the standard rules for all quantities and units; and also to clarify the basic differences among quantity symbols, unit symbols, and abbreviations. This project is a revision of ANSI/IEEE Y10.11(1984).
          """
        #metaKeywords: null
        #metaDescription: null
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    #currentLocale: "en_US"
    #currentTranslation: null
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    -author: ""
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    }
    -canceledAt: null
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    -documents: Doctrine\ORM\PersistentCollection {#94956 …}
    -favorites: Doctrine\ORM\PersistentCollection {#94954 …}
  }
]
Attributes
[]
Component
App\Twig\Components\ProductMostRecent {#95211
  +product: App\Entity\Product\Product {#94879
    #id: 8418
    #code: "IEEE00000445"
    #attributes: Doctrine\ORM\PersistentCollection {#94942 …}
    #variants: Doctrine\ORM\PersistentCollection {#94940 …}
    #options: Doctrine\ORM\PersistentCollection {#94936 …}
    #associations: Doctrine\ORM\PersistentCollection {#94938 …}
    #createdAt: DateTime @1751037400 {#94874
      date: 2025-06-27 17:16:40.0 Europe/Paris (+02:00)
    }
    #updatedAt: DateTime @1754606304 {#94881
      date: 2025-08-08 00:38:24.0 Europe/Paris (+02:00)
    }
    #enabled: true
    #translations: Doctrine\ORM\PersistentCollection {#94952 …}
    #translationsCache: [
      "en_US" => App\Entity\Product\ProductTranslation {#95110
        #locale: "en_US"
        #translatable: App\Entity\Product\Product {#94879}
        #id: 28681
        #name: "IEEE 260.4:1996 (R2008)"
        #slug: "ieee-260-4-1996-r2008-ieee00000445-240070"
        #description: """
          New IEEE Standard - Superseded.<br />\n
          Reaffirmed 2008. Letter symbols for physical quantities used in the science and technology of acoustics are covered. Abbreviations for a number of acoustical levels and related measures that are in common use are also given. The symbols given in this standard are intended for all applications.<br />\n
          \t\t\t\t<br />\n
          To establish a standard set of letter symbols for quantities used in the science and technology of acoustics: also to establish standard abbreviations for a number of acoustical levels and related measures that are in common use. The science and technology of acoustics include sound, ultrasound, and infrasound in all media: gases, especially air; liquids, especially water; and solids are examples of media with which acoustics is concerned. There are many specialties in acoustics, a few of which are: speech, hearing, music, noise control, vibration, shock, and sonar.<br />\n
          To clarify the technical literature of acoustics by providing a standard set of letter symbols for use in mathematical formulations, and a standard set of abbreviations for use in text, especially in tabulations and on graphs; also to encourage the treatment of levels according to the standard rules for all quantities and units; and also to clarify the basic differences among quantity symbols, unit symbols, and abbreviations. This project is a revision of ANSI/IEEE Y10.11(1984).
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}
ProductCard App\Twig\Components\ProductCard 146.0 MiB 7.26 ms
Input props
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ProductState App\Twig\Components\ProductState 146.0 MiB 0.15 ms
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ProductMostRecent App\Twig\Components\ProductMostRecent 146.0 MiB 0.61 ms
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          This standard provides a set of letter symbols for quantities and abbreviations and recommendations for their use in the science and technology of acoustics. The science and technology of acoustics includes sound, ultrasound, and infrasound in all media. Gases, especially air; liquids, especially water; and solids are examples of media with which acoustics is concerned. Specialties within acoustics that make use of the letter symbols and abbreviations within this standard include, but are not limited to: speech, hearing, music, noise control, vibration, shock, sonar, and transducers. Although remarks and limited short-form information are provided for many of the symbols and abbreviations contained herein, definitions and methods of calculating the various quantities are outside the scope of this standard.<br />\n
          The purpose of this standard is to clarify the technical literature of acoustics by providing a standard set of letter symbols for use in mathematical formulations and a standard set of abbreviations for use in text, especially in tabulations and on graphs. This standard also encourages the treatment of levels according to the standard rules for all quantities and units and clarifies the basic differences among quantity symbols, unit symbols, and abbreviations.
          """
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