is a process of capturing data or translating information to a format stored on a storage medium often referred to as a record. is an electrical or mechanical inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects.
Ways of recording text suitable for direct reading by humans includes writing it on paper. Other forms of data storage are easier for automatic retrieval, but humans need a tool to read them. Printing a text stored in a computer allows keeping a copy on the computer and having also a copy that is human-readable without a tool.
Recordings includes tapes, records, and compact discs. Tapes may be in form of teacher- recorded, student-recorded or ready-made tapes that are commercially produced. Audio media are used by teachers in connection with speech rehearsals, drama musical presentation.
Two main classes of sound recording technology1. Analog Recording- is achieved by a small microphone diaphragm that can detect changes in atmospheric pressure (acoustic sound waves) and record them as a graphic representation of the sound waves on a medium such as a phonograph (in which a stylus senses grooves on a record).- A process with a bigger loudspeaker diaphragm causing changes to atmospheric pressure to form acoustic sound waves.
2. Digital Recording- converts the analog sound signal picked up by the microphone to a digital form by a process of digitization, allowing it to be stored and transmitted by a wider variety of media.- stores audio as a series of binary numbers representing samples of the amplitude of the audio signal at equal time intervals, at a sample rate so fast that the human ear perceives the result as continuous sound.
- digital format can prevent much loss of quality found in analog recording due to noise and electromagnetic interference in playback, and mechanical deterioration or damage to the storage medium.
PROCESS Recording1. The analog signal is transmitted from the input device to an analog-to-digital converter (ADC).2. The ADC converts this signal to a series of binary numbers. The quantity of numbers produced per second is called the sample rate.3. These numbers are stored onto recording media such as magnetic tape or hard drive or optical drive.
Playback1. The sequence of numbers is transmitted from storage into a digital-to-analog converter (DAC), which converts the numbers back to an analog signal.2. This signal amplified and transmitted to the loudspeakers or video screen.
Easy to operate Safe way of storing information Can be used for big or small groups Best used to improve speech skills Lessen distraction when used with headphones.
Extended use may bore students Costly compared to actual oral presentation