Firth vs. Sound

By Jaxson

Main Difference

The main difference between Firth and Sound is that the Firth is a word in the Lowland Scots language and in English used to denote various coastal waters in Scotland and England and Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing; pressure wave, generated by vibrating structure

  • Firth

    Firth is a word in the Scots and English languages used to denote various coastal waters in Scotland and even a strait. In the Northern Isles, it more usually refers to a smaller inlet. It is linguistically cognate to fjord (both from Proto-Germanic *fer├żuz) which has a more constrained sense in English. Bodies of water named “firths” tend to be more common on the east coast, or in the southwest of the country, although the Firth of Lorn is an exception to this. The Highland coast contains numerous estuaries, straits, and inlets of a similar kind, but not called “firth” (e.g. the Minch and Loch Torridon); instead, these are often called sea lochs. Before about 1850, the spelling “Frith” was more common.

    A firth is generally the result of ice age glaciation and is very often associated with a large river, where erosion caused by the tidal effects of incoming sea water passing upriver has widened the riverbed into an estuary. Demarcation can be rather vague. The Firth of Clyde is sometimes thought to include the estuary as far upriver as Dumbarton, but the Ordnance Survey map shows the change from river to firth occurring off Port Glasgow, while locally the change is held to be at the Tail of the Bank where the river crosses a sandbar off Greenock at the junction to the Gare Loch, or even further west at Gourock point.

    However, some firths are exceptions. The Cromarty Firth on the east coast of Scotland, for example, resembles a large loch with only a relatively small outlet to the sea and the Solway Firth and the Moray Firth are more like extremely large bays. The Pentland Firth is a strait rather than a bay or an inlet.

  • Sound

    In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.

    In human physiology and psychology, sound is the reception of such waves and their perception by the brain. Humans can hear sound waves with frequencies between about 20 Hz and 20 kHz. Sound above 20 kHz is ultrasound and below 20 Hz is infrasound. Different animal species have varying hearing ranges.

  • Firth (noun)

    An arm of the sea.

  • Firth (noun)

    A frith; a wood, wooded country.

  • Sound (adjective)


    “He was safe and sound.”

    “In horse management a sound horse is one with no health problems that might affect its suitability for its intended work.”

  • Sound (adjective)

    Complete, solid, or secure.

    “Fred assured me the floorboards were sound.”

  • Sound (adjective)

    Having the property of soundness.

  • Sound (adjective)

    Good; acceptable; decent.

    “”How are you?” – “I’m sound.””

    “That’s a sound track you’re playing.”

    “See that man over there? He’s sound. You should get to know him.”

  • Sound (adjective)

    Quiet and Sound asleep means sleeping peacefully, often deeply.

    “Her sleep was sound.”

  • Sound (adjective)

    Heavy; laid on with force.

    “a sound beating”

  • Sound (adjective)

    Founded in law; legal; valid; not defective.

    “a sound title to land”

  • Sound (adverb)


  • Sound (interjection)

    Yes; used to show agreement or understanding, generally without much enthusiasm.

    “- I found my jacket.
    – Sound.”

  • Sound (noun)

    A sensation perceived by the ear caused by the vibration of air or some other medium.

    “He turned when he heard the sound of footsteps behind him.”

    “Nobody made a sound.”

  • Sound (noun)

    A vibration capable of causing such sensations.

  • Sound (noun)

    A distinctive style and sonority of a particular musician, orchestra etc

  • Sound (noun)

    Noise without meaning; empty noise.

  • Sound (noun)

    A long narrow inlet, or a strait between the mainland and an island; also, a strait connecting two seas, or connecting a sea or lake with the ocean.

    “Puget Sound; Owen Sound”

  • Sound (noun)

    The air bladder of a fish.

    “Cod sounds are an esteemed article of food.”

  • Sound (noun)

    A cuttlefish.

  • Sound (noun)

    An instrument for probing or dilating; a sonde.

  • Sound (noun)

    A long, thin probe for sounding body cavities or canals such as the urethra.

  • Sound (verb)

    To produce a sound.

    “When the horn sounds, take cover.”

  • Sound (verb)

    To convey an impression by one’s sound.

    “He sounded good when we last spoke.”

    “That story sounds like a pack of lies!”

  • Sound (verb)

    To be conveyed in sound; to be spread or published; to convey intelligence by sound.

  • Sound (verb)

    To resound.

  • Sound (verb)

    To arise or to be recognizable as arising in or from a particular area of law.

  • Sound (verb)

    To cause to produce a sound.

    “He sounds the instrument.”

  • Sound (verb)

    To pronounce.

    “The “e” in “house” isn’t sounded.”

  • Sound (verb)

    Dive downwards, used of a whale.

    “The whale sounded and eight hundred feet of heavy line streaked out of the line tub before he ended his dive.”

  • Sound (verb)

    To ascertain, or try to ascertain, the thoughts, motives, and purposes of (a person); to examine; to try; to test; to probe.

    “When I sounded him, he appeared to favor the proposed deal.”

  • Sound (verb)

    Test; ascertain the depth of water with a sounding line or other device.

    “Mariners on sailing ships would sound the depth of the water with a weighted rope.”

  • Sound (verb)

    To examine with the instrument called a sound or sonde, or by auscultation or percussion.

    “to sound a patient, or the bladder or urethra”


Firth Illustrations

Sound Illustrations

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