The tenor saxophone, like all saxophones, consists of an approximately conical tube of thin brass, a type of metal. The wider end of the tube is flared slightly to form a
bell, while the narrower end is connected to a single reed mouthpiece similar to that of the clarinet. At intervals down the bore is placed between 20 and 23
tone holes; these are covered by pads which can be pressed onto the holes to form an airtight seal. There are also two small speaker holes which, when opened, disrupt the lower
harmonics of the instrument and cause it to
overblow into an
upper register. The pads are controlled by pressing several keys with the fingers of the left and right hands; the left thumb controls an
octave key which opens one or other of the speaker holes. The original design of the tenor saxophone had a separate octave key for each speaker hole, in the manner of the
bassoon; the mechanism by which the correct speaker hole is selected based on the fingering of the left hand (specifically the left
ring finger) was developed soon after Sax's patent expired in 1866. Although a handful of novelty tenors have been constructed 'straight', like the smaller members of the saxophone family, the unwieldy length of the straight configuration means that almost all tenor saxophones feature a 'U-bend' above the third-lowest tone hole which is characteristic of the saxophone family. The tenor saxophone is also curved at the top, above the highest tone hole but below the highest speaker hole. While the
alto is usually bent only through 80–90° to make the mouthpiece fit more easily in the mouth, the tenor is usually bent a little more in this section, incorporating a slight S-bend. The
mouthpiece of the tenor saxophone is very similar to that of the clarinet: an approximately wedge-shaped tube, open along one face and covered in use by a thin strip of material prepared from the stem of the giant cane (
Arundo donax) commonly known as a
reed. The reed is shaved to come to an extremely thin point and is clamped over the mouthpiece by the use of a
ligature. When air is blown through the mouthpiece, the reed vibrates and generates the
acoustic resonances required to produce a sound from the instrument. The mouthpiece is the area of the saxophone with the greatest flexibility in shape and style, so the
timbre of the instrument is primarily determined by the dimensions of its mouthpiece. The design of the mouthpiece and reed plays a big role in how a saxophone sounds. Classical mouthpieces generally help produce a warmer and rounder tone, while jazz mouthpieces generally help produce a brighter and edgier tone. Materials used in mouthpiece construction include
plastic,
ebonite and various metals, for example
bronze,
brass and
stainless steel. The mouthpiece of the tenor saxophone is proportionally larger than that of the alto, necessitating a similarly larger
reed. The increased stiffness of the reed and the greater airflow required to establish resonance in the larger body means the tenor sax requires greater lung power but a looser
embouchure than the higher-pitched members of the saxophone family. The tenor sax reed is similar in size to that used in the
bass clarinet, and the two can be easily substituted. ==Uses==