WAVE ELEMENT UNDERSTAND, AND SPECIES OF WAVE INTERACTION UNDERSTAND NATURE SIGNAL AUDIO By Sarbini, S.Pd (SMK Muhammadiyah 3 Yogyakarta)

Teknologi dan Rekayasa BASIC 1.THE MEANING OF AUDIO Defined as the audio sound reproduction or sound. Sound waves: the wave generated from an object that vibrates. Sound waves have a hill and valley, one hill and valley will result in one cycle (period).

Teknologi dan Rekayasa Frequency is the number of cycles that occur in one second. (Hz Units)

Teknologi dan Rekayasa Illustration of Audio

Teknologi dan Rekayasa THE AUDIO AREA :  Studio Sound Engineer  Live Sound Engineer  Musician  Music Producer  DJ (Disc Jocky)  Radio engineers  The voice recorder Film / Television Sound Field Engineer  Audio Editor Post-Production Audio Creator

Teknologi dan Rekayasa Things about the audio is :  Sound waves: what is that sound, how to produce and how to listen.  Voice equipment : what difference components, how it works, how to choose the right equipment and how to use it appropriately.

Teknologi dan Rekayasa  Waves with constant frequency

Teknologi dan Rekayasa This vibration causes air listener ear drum vibrates with the same pattern

Teknologi dan Rekayasa  Length Waves : The distance between point and point waves equivalent to the next phase Amplitudo: power or strength of the signal wave. High waves, which can be viewed as a graph

Teknologi dan Rekayasa  Frekuensi : Jumlah getaran yang terjadi dalam waktu satu detik  Getaran gelombang suara semakin cepat, frekuensi semakin tinggi.  Frekuensi lebih tinggi diinterpretasikan sebagai jalur lebih tinggi.

Teknologi dan Rekayasa 2. FREQUENCY, PERIOD AND PHASE Frequency (F): the number of vibrations that occur within seconds or a number of wave / vibration electricity generated each second. Period (T): the lapse of time needed to do a perfect vibration.

Teknologi dan Rekayasa  Relations Between the Period and Frequency: f = 1/T  T = 1/f Description: F: frequency, in cycles per second (Hz) T: period (seconds).

Teknologi dan Rekayasa If the speed of rotation is expressed with the angle , the frequency bands with the same corner speed divided by the size of the corner of one full lap (2p) or can be written: f =  /2    = 2  f With the speed  is the angle in the Radial / sec

Teknologi dan Rekayasa INTERFUSION WAVE 1.Phase sound waves in the same note that the waves are stronger.

Teknologi dan Rekayasa 2.Sound waves with opposite phase, 180o behind each note produces zero. This is found in many working tools nois delay. + =

Teknologi dan Rekayasa 3.Gelombang voice that has varied the phase relationship influences the sound that different. + =

Teknologi dan Rekayasa 3. WAVE PROPAGATION Wavelength = speed / frequency ë = c/f c = speed of sound waves ( m / sec ) f = frequency (Hertz) ë = wavelength (m)

Teknologi dan Rekayasa 4. Combination Sinus Waves 5. Combination Sinus Waves Delayed