An instrument is a concrete or abstract tool intended for a purpose other than mechanical work, in particular a refined one.
Musical instruments are devices designed to produce music, frequently by plucking or striking a string or bell or drum surface, or by forcing air to resonate (see wind instruments).
... out of which 43.6% have children under the age of 18 living with them, 67.6% are married couples living together, 11.5% have a female householder with no husband present, ...