clarion

A medieval brass instrument chiefly used as a battle signal; related to the trumpet, it had a narrow, straight pipe and a high-pitched, piercing sound.

The clarion’s call to action has been heard.

Then ſtrait commands that at the warlike ſound / Of Trumpets loud and Clarions be upreard / His mighty Standard; […]

The sound of a clarion (sense 1), or any sound resembling the loud, high-pitched note of a clarion.

Others [i.e., other birds] on ground / Walk'd firm; the creſted Cock whoſe clarion ſounds / The ſilent hours, and th' other whoſe gay Traine / Adorns him, colour'd with the Florid hue / Of Rainbows and Starrie Eyes.

And his this Drum, vvhoſe hoarſe heroic baſe / Drovvns the loud Clarion of the braying Aſs.

An organ stop consisting of pipes with reeds giving a high-pitched note like that of a clarion (sense 1).

The middle register of the clarinet.

A charge thought to represent a type of wind instrument, a keyboard instrument like a spinet, or perhaps a rest used by a knight to support a lance during jousting.

Of a sound, a voice, a message, etc.: brilliantly clear.

her clarion top notes

And loud that clarion voice replied / Excelsior!

To announce or herald (something) using a clarion (noun sense 1).

To announce or herald (something) using a clarion (noun sense 1).

His deep voice clarioned the words and he paused, hearing them whisper away into their last faint echoes in the organ loft.

He [Martin Luther King Jr.] clarioned a call to action that was heard wherever Afro-Christians could be found (and beyond, if one recalls Pentecostalism).

Of a thing: to cause (a place) to echo with a sound like that of a clarion.

Sir Knight, thy glory clarioneth the heavens.

To sound a clarion; also, to make a high-pitched, piercing sound like that of a clarion.

[T]hou, young-bodied morn, / In-ushered by the puffed winds clarioning, / No bond can bind.

We dogs are all a-mourning; but thou [a rooster] clappest thy wings and clarionest thy loudest and treadest hen after hen.