Guitars
Acoustic Guitar
The acoustic guitar is a six-string, flat-top instrument designed to project sound without electronic amplification. Its hourglass-shaped body, braced soundboard, and central soundhole work together to amplify the vibration of its strings naturally. Because it can be played solo or in a group, strummed for rhythm or picked for melody, it has become one of the most widely recognized string instruments in American and global popular music.
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| Family | Guitars |
|---|---|
| Region / context | Spain, later United States |
| Playing method | Strummed with a pick or fingers, or plucked fingerstyle |
| Number of strings | 6 strings (12-string variants also exist; see Twelve-String Guitar) |
| Common tuning | Standard: E2-A2-D3-G3-B3-E4 (low to high); many alternate tunings are also common |
| String material | Steel, often with bronze or phosphor-bronze winding on the lower strings |
| Construction | Flat-top, hourglass-shaped body with an open soundhole; sizes include parlor, dreadnought, and jumbo body styles |
| Size range | Full-size body roughly 97-104 cm in overall length; 3/4 and travel sizes are common for smaller players |
| Portability | Portable — Fits in a soft gig bag or hard case and travels reasonably well, though the body is more fragile than a solid-body electric instrument. |
| Acoustic volume | Moderate-Loud — Projects clearly in a room without amplification; dreadnought and jumbo bodies tend to be louder than parlor sizes. |
| Musical contexts | Common in folk, pop, country, singer-songwriter, and rock contexts, often as both a rhythm and lead instrument. |
| Beginner learning curve | Moderate — Many learners find basic strumming and open chords approachable within weeks, though steel strings can be firm on the fingertips at first. |
| Maintenance | Routine string changes every 1-3 months of regular play, periodic tuning, and humidity control to protect the wooden body from cracking or warping. |
| Amplification | Acoustic by design; many modern models include an optional under-saddle or soundhole pickup for stage use. |
| Practice environments | Comfortable in most home settings; its natural volume means it is not ideal for late-night practice in shared housing without a practice mute. |
Origin and Background
The modern steel-string acoustic guitar grew out of the 19th-century Spanish guitar design refined by Antonio de Torres Jurado, which American builders such as C. F. Martin adapted with steel strings and reinforced bracing in the late 19th and early 20th centuries.
Sources
- The Metropolitan Museum of Art, Department of Musical Instruments
- Grove Music Online
- Smithsonian Institution, National Museum of American History
Content last checked against our reference sources on October 14, 2026. See our sources and methodology page for how we research instrument profiles.