LM386 audio amplifier for voice

The LM386 is a power amplifier designed for use in low voltage consumer applications.
The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.
The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation.

The features of LM386 are : Battery operation, Minimum external parts, Wide supply voltage range: 4V–12V or 5V–18V, Low quiescent current drain: 4mA, Voltage gains from 20 to 200, Low distortion: 0.2% (AV = 20, VS = 6V, RL = 8W, PO = 125mW, f = 1kHz).
This audio amplifier IC can be used in more applications like : AM-FM radio amplifiers ,Portable tape player amplifiers ,Intercoms ,TV sound systems , Line drivers , Ultrasonic drivers , Small servo drivers ,Power converters.
The device presented in this schematic needs a 9 volts DC power supply and a 8 ohms impedance speaker.