Interactive Acoustic Metallurgy & Chime Synthesizer

Metallic Sound Lab — Hear What Sounds 12 Different Metals Make & Compose Music

Strike 12 suspended forged bars of 24K Gold, 999 Fine Silver, B20 Bell Bronze, Anodized Titanium, Damascus Steel, Copper, Platinum, and Tibetan Singing Alloy. Compare how density and speed of sound shape each metal's ring, or forge all 12 bars into a single alloy to play melodies.

Struck Metal: 999 Fine Silver (Ag) Density / Speed: 10.5 g/cm³ · 3,650 m/s Pitch & Sustain: 528 Hz · 5.2s Ring
Your browser supports HTML5 Canvas to render 12 suspended forged metal chime bars with animated striker hammers and acoustic wave rings.
16-Step Metallic Wind-Chime & Alloy Looper Swipe across bars to glissando · Keys 1–9, 0, -, = strike bars 1–12
Metallurgical Thickness, Acoustic Q-Factor & Tempo

What Sounds Do Different Metals Make? The Physics of Acoustic Metallurgy

Every pure metal and engineered alloy possesses a distinct acoustic fingerprint—known to metallurgists, numismatists, and bell founders as its ring tone or acoustic resonance signature. When a hammer strikes a suspended metal bar, the kinetic energy excites transverse bending waves and longitudinal compression waves that race through the crystalline lattice at the metal's speed of sound $c = \sqrt{E / \rho}$.

Metallic Sound Lab lets you experience and compare all 12 iconic metals side by side—or forge an entire 12-note musical chime rack from your favorite element to compose melodies and ambient wind-chime polyrhythms.

How to Compare Metals & Compose Metallic Music

  1. 12-Metal Comparison Mode (Default): In ★ All 12 Metals (Compare) mode, each of the 12 suspended bars is forged from a different metal: from **24K Pure Gold** and **999 Fine Silver** to **B20 Bell Bronze**, **Grade-5 Titanium**, and **Pure Tungsten**. Tap each bar or click ✨ Sweep All 12 Metals to hear how internal friction ($Q$-factor) and overtone ratios change dramatically from metal to metal.
  2. Single-Metal Concert Mode: Click any individual metal chip in the top ribbon (such as 1. 999 Fine Silver, 3. B20 Bell Bronze, or 4. Grade-5 Titanium) to forge all 12 bars out of that single alloy. Now you can swipe across the rack or use computer keys 1 2 3 4 5 6 7 8 9 0 - = to play pure melodies in that metal's exact voice.
  3. Switch Striker Hammer Materials: Change the striker in the bottom dock between a Hardened Steel Hammer (bright metallic clink + incandescent forge sparks), a Solid Brass Mallet, a Soft Felt Choir Wand (pure fundamental hum), or a Magnetic Singing Sustainer.
  4. Program the 16-Step Metallic Chime Looper: Click ▶ Play Chime Loop and toggle steps 1–16 to weave a hypnotic, self-playing metallic gamelan or wind-chime soundscape.

Metallurgical Speed of Sound, Young's Modulus & Damping Formulas

TheWeb Audio synthesis engine calculates each metal's partial frequencies, brightness envelope, and decay time ($\tau$) from three physical metallurgy equations:

1. Longitudinal Speed of Sound in a Metal Rod (Young's Modulus E, Density ρ):
c_metal = sqrt(E / ρ) m/s

2. Transverse Bending Mode Frequencies of a Free Metal Bar (Length L, Thickness h):
f_n = (π · h / (4 · sqrt(3) · L²)) × c_metal × (2n + 1)² ⇒ Partials at 1.000 : 2.756 : 5.404

3. Internal Friction & Acoustic Decay Time Constant (Quality Factor Q):
τ_decay(f) = Q_metal ÷ (π · f) seconds

Complete Acoustic Comparison Chart of the 12 Metals & Alloys

Bar & Key Metal / Alloy Name Density ($\rho$) Sound Speed ($c$) Acoustic $Q$ (Sustain) Signature Sound Character
Bar #1 [Key 1] 24K Pure Gold (Au) $19.32\text{ g/cm}^3$ $3,240\text{ m/s}$ Low-Med (1.4 s) Warm, dark, velvety thud with soft overtones
Bar #2 [Key 2] 999 Fine Silver (Ag) $10.49\text{ g/cm}^3$ $3,650\text{ m/s}$ Very High (5.2 s) Sweet, pure, singing "silver coin" bell ring
Bar #3 [Key 3] B20 Bell Bronze (CuSn20) $8.80\text{ g/cm}^3$ $3,500\text{ m/s}$ Extreme (6.4 s) Majestic temple/church bell roar & hum note
Bar #4 [Key 4] Grade-5 Titanium (Ti6Al4V) $4.43\text{ g/cm}^3$ $6,070\text{ m/s}$ Very High (4.8 s) Laser-crisp, glassy aerospace high-frequency ring
Bar #5 [Key 5] Damascus High-Carbon Steel $7.85\text{ g/cm}^3$ $5,960\text{ m/s}$ High (4.2 s) Bright, high-tension sword-blade "shing" chime
Bar #6 [Key 6] Electrolytic Copper (Cu) $8.96\text{ g/cm}^3$ $4,760\text{ m/s}$ Medium (2.2 s) Mellow, earthy rose-copper mid-range tone
Bar #7 [Key 7] 950 Platinum (Pt) $21.45\text{ g/cm}^3$ $3,260\text{ m/s}$ Medium (2.0 s) Ultra-dense, heavy, authoritative deep chime
Bar #8 [Key 8] Cartridge Yellow Brass $8.53\text{ g/cm}^3$ $4,700\text{ m/s}$ High (3.8 s) Vibrant, brassy horn-like harmonic projection
Bar #9 [Key 9] 6061 Aircraft Aluminum $2.70\text{ g/cm}^3$ $6,420\text{ m/s}$ High (4.1 s) Light, airy, floating vibraphone bell sustain
Bar #10 [Key 0] Tibetan 7-Metal Alloy $8.65\text{ g/cm}^3$ $3,580\text{ m/s}$ Extreme (6.8 s) Binaural beating (+2.2 Hz) meditation bowl hum
Bar #11 [Key -] Gray Cast Iron (Anvil) $7.20\text{ g/cm}^3$ $4,500\text{ m/s}$ Low (0.65 s) Graphite-damped blacksmith anvil clink-thud
Bar #12 [Key =] Pure Tungsten (W) $19.25\text{ g/cm}^3$ $5,220\text{ m/s}$ High (3.6 s) Diamond-hard, piercing high-impedance ping

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Frequently Asked Questions

1. Why do different metals make completely different sounds when struck?
The sound of a struck metal bar depends on three physical properties: its longitudinal speed of sound c = sqrt(E / ρ) (determined by Young's elastic modulus E divided by density ρ), its crystal grain structure, and its internal friction (measured as the acoustic Q-factor). High-Q alloys like B20 Bell Bronze, 999 Silver, and Titanium ring for several seconds, while soft, high-density metals like 24K Gold or graphite-rich Cast Iron absorb high overtones quickly.
2. Why does 999 Fine Silver ring longer and brighter than 24K Pure Gold?
Although both are noble metals, 24K Gold has a very high density (19.32 g/cm³) and lower elastic stiffness (79 GPa), giving it a slower speed of sound (3,240 m/s) and high internal dislocation damping that produces a warm, short, buttery thud. Fine Silver has nearly half the density (10.49 g/cm³) and a higher speed of sound (3,650 m/s) with low internal friction, creating the famous long, sweet silver coin and bell ring.
3. Why is B20 Bronze (80% Copper, 20% Tin) used for church bells and professional cymbals?
Pure copper is too soft and malleable to ring for long. Alloying 80% copper with 20% tin creates a rigid intermetallic microstructure with exceptionally low internal damping (Q > 2,500), allowing complex inharmonic overtones and deep hum notes to sustain for up to 8 seconds.
4. How can I make music using the 12 different metals in this app?
You can play in All 12 Metals Comparison Mode (where each bar is a different metal tuned across a harmonic scale), or click any metal in the top ribbon to forge all 12 bars out of that single metal. You can also turn on the 16-Step Metallic Chime Looper at the bottom to layer Gold, Silver, Bronze, Titanium, and Tibetan Singing Alloy into a looping ambient rhythm.
5. How does changing the Striker Hammer material affect the metallic sound?
A Hardened Steel Hammer has a tiny contact duration (< 0.5 ms), exciting bright high-frequency partials and throwing incandescent forge sparks. A Soft Felt Choir Wand lengthens the contact time, suppressing upper clink partials so you hear only the warm fundamental hum of the metal.
6. Why does this metal sound lab run at 60–120 FPS without white screen blinks?
The studio uses a hardware-locked opaque canvas ({ alpha: false }), pre-baked forged iron gantry hardware, and warm amber/cyan metallic shaders with -webkit-tap-highlight-color: transparent, eliminating mobile tap flicker.