Gong Frequency: How Size, Metal, and Hammering Shape Sound

A gong's frequency is its fundamental pitch — set mostly by its diameter, its thickness, and the metal it's made from — plus a dense field of overtones that, unlike a guitar string's, don't land at neat multiples of that pitch. That crowded, slightly “off” overtone field is why a gong sounds like a gong: less a single note than a wash of sound that keeps shifting as it rings. This guide covers what actually determines a gong's frequency — size, alloy, hammering, lathing, and the mallet in your hand — and how each shapes what you hear in a sound bath or meditation session. And because every gong we sell is individually recorded, you don't have to take a frequency chart's word for any of it. You can listen to the exact instrument.

What is a gong's frequency?

Strike a gong and it vibrates in dozens of patterns at once. The slowest of them — the whole face flexing together — produces the fundamental: the pitch you'd hum if someone asked what note the gong is. Two things mostly set it. Diameter comes first, and the relationship is steep — in an ideal flat plate, doubling the width drops the fundamental by two full octaves, and while real gongs deviate from the ideal, the direction holds: wider rings lower. Thickness pushes the other way: a thicker plate is stiffer and rings higher. The metal matters too, since stiffness and density vary by alloy, and so does everything the maker does to the face afterward — the hammering, the lathing, the rim.

A single frequency number is a simplification, though. What reaches your ear is the whole spectrum at once, and in a gong that spectrum behaves differently than in almost any other instrument.

Why a gong doesn't sound like a single note

Pluck a string or blow across a flute and the overtones line up at whole-number multiples of the fundamental — twice, three times, four times its frequency. Your ear fuses that tidy series into one clear pitch. A gong is a plate, and plates don't work that way. A plate's vibration patterns fall at irregular intervals — what acousticians call inharmonic partials — so a gong's overtones crowd, clash, and beat against one another instead of reinforcing a single note. (The standard treatment of this is Fletcher and Rossing's The Physics of Musical Instruments.) That inharmonicity isn't a flaw to be engineered out. It is the sound: the shimmer, the wash, the sense that the tone is alive and moving.

An earlier version of this article claimed a gong's overtones occur at mathematical multiples of the fundamental. That's true of strings and air columns — not of gongs. We've corrected it.

Attack, bloom, decay

A gong's sound has three chapters.

The attack is the strike itself — a short burst whose character is set mostly by the mallet (more on that below).

The bloom is the strange part, and it's well documented. In large Chinese-style gongs, energy the strike puts into the low, slow vibration patterns leaks upward into higher ones, so the sound swells and brightens for a second or more after you've hit it (Rossing and Fletcher measured this in the Journal of the Acoustical Society of America in 1983). Some smaller Chinese gongs go further and audibly glide in pitch after the strike — rising in some types, falling in others (Fletcher, JASA, 1985).

The decay runs long. The high partials fade first, leaving a low, slowly dimming tail that can carry for a minute or more on a large gong.

Hammering and lathing decide how those chapters read. Hammer peening and the lathed rings on a gong's face vary its thickness point by point, which tunes which vibration patterns speak loudest. A flat, fully lathed disc crashes bright and blooms fast; a gong with a deep turned rim and a burnished center holds a rounder fundamental and swells slowly. When you compare gongs, this is the useful vocabulary — bright or dark, fast bloom or slow, wash or focus — not a number in Hertz.

Raven Sounds bronze gongs: two families of voicing

Our own gongs are hand-hammered bronze in sizes from 16" to 40", made with the Chinese workshop we've long partnered with, and they fall into two broad families.

The Chau family — the Chau Gong and Solar Chau Gong — is the traditional form: a turned rim, lathed rings, a focused center. These are the rounder, darker voices, with a defined fundamental at the strike and a slow swell behind it.

The wind-gong family — the Wind Gong, Sun Gong, Eclipse Gong, and Solar Eclipse Gong — are flat, fully lathed discs. They speak immediately: a brighter crash, a faster bloom, a shimmering wash that sits on top of the room rather than underneath it.

At Raven Sounds, specific lathing designs are employed to bring different parts of that spectrum forward, which is why two styles of the same size can read as entirely different instruments. Every Raven Sounds gong ships with a free premium mallet, and every one is individually recorded — the sound file on each product page is of the actual gong that ships. Browse the full line at Raven Sounds Gongs.

Grotta Sonora: stainless steel, titanium, and nickel silver

Grotta Sonora gongs are handmade in Italy with a construction most gongs don't share — a folded rim, which changes how the edge of the plate carries vibration. Grotta works in three metals, and the alloy is a real part of each gong's voice.

Stainless steel is the line's workhorse: the Deep gongs (26", 34") and the 32" King Gong are stainless, voiced toward weighty fundamentals and very long tails.

Titanium gives the Blue Cosmo gongs — the 24" and the 19" handheld — a brighter, more present overtone field over the same long Grotta sustain.

Nickel silver — a copper-nickel-zinc alloy that, despite the name, contains no silver — sits between the two; the 24" and 32" Nickel Silver gongs carry a silvery upper wash on a warm core.

For played-in-hand work there's also the 19" Handheld Gong. The honest way to compare any of them isn't a spec sheet — it's the recordings on each product page, which capture the exact gong you'd receive.

The mallet is half the sound

The same gong is two instruments in two hands, because the mallet selects which vibration patterns get the energy. A big, soft head sinks the strike into the low patterns: fundamental-forward, gentle attack, slow bloom. A smaller or firmer head feeds the upper partials: sharper attack, brighter wash, faster response.

We carry gong mallets matched to different gong weights and voicings — including our own Cosmic Tones Gong Mallet, built for deep fundamentals, and Grotta Sonora's Small and Big mallets sized to their line. Most players end up keeping at least two.

Gongs alongside singing bowls and chimes

In a sound bath, gongs rarely work alone, and the reason is acoustic: the instruments sit at opposite ends of a spectrum. A crystal singing bowl rings close to a single sustained tone — pure, steady, and pitched. A gong is that tone's opposite: broadband, inharmonic, always in motion. Played together they don't blur; the bowl holds a floor and the gong moves over it. Koshi chimes sit at a third point — each element is tuned to its own chord of small, bright notes, useful as accents against a gong's wash, and the Set of 4 Elements covers all four tunings. Practitioners commonly sequence all three across a session; the mix is a matter of ear and pacing, not formula.

Choose with your ears, not a chart

Two hand-hammered gongs of the same style and size are not the same instrument. Every hammer blow leaves the metal slightly different, so each gong carries its own version of the style's voice — its own partial balance, bloom speed, and tail. That's why we record every gong individually: the sound file on a product page is the exact instrument that ships, not a representative sample. If you're weighing a purchase, skip the frequency chart, put on headphones, and listen to the specific gong — or start wide and browse all gongs.

FAQ

What gong frequency is best for meditation?

There's no single best frequency. Larger gongs give a deeper, more enveloping wash; flat wind-style gongs give a brighter, faster-speaking shimmer. Which serves a session comes down to the room, the practice, and taste — listen to the recordings and choose the sound you want to sit inside.

Do stainless steel, titanium, and bronze gongs sound different?

Yes. The alloy changes the plate's stiffness, density, and damping, which shifts the balance of partials and the length of the tail. Bronze reads warm and traditional; Grotta's stainless Deep and King gongs run dark and long; titanium is brighter and more present. The differences are easier heard than described — every gong's product page carries its recording.

Does a gong's size change its frequency?

Yes — width is the biggest single factor, and larger means lower. Thickness pushes the other way (thicker plates are stiffer and ring higher), and hammering, lathing, and rim shape fine-tune the result.

Which mallet should I use?

Match the mallet to the sound you're after, not just the gong: large, soft heads bring out the fundamental and a slow bloom; smaller, firmer heads bring out attack and upper partials.

Why does a gong get louder after you strike it?

That swell is the bloom: in large Chinese-style gongs, energy moves from the low vibration patterns into higher ones for a second or more after the strike, so the sound brightens and grows before it decays. It's a measured property of the instrument — and one more reason to judge a gong by its recording, not its photo.

References: N.H. Fletcher & T.D. Rossing, The Physics of Musical Instruments, 2nd ed. (Springer, 1998); T.D. Rossing & N.H. Fletcher, “Nonlinear vibrations in plates and gongs,” J. Acoust. Soc. Am. 73, 345–351 (1983); N.H. Fletcher, “Nonlinear frequency shifts in quasispherical-cap shells: Pitch glide in Chinese gongs,” J. Acoust. Soc. Am. 78, 2069–2073 (1985).