Representing Sound
Bayani Gaba-gaba
Sound is a wave in the air. It never stops changing, it has no edges, and between any two instants there is another instant. A computer has none of those qualities: it stores a finite list of whole numbers and nothing else. So recording sound is not a matter of copying it into a machine. It is a matter of measuring it, over and over, fast enough that the list of measurements can be turned back into something a human ear accepts as the original.
This lesson explains what that measuring process is, what the two settings that control it actually do, and how to calculate the size of the file that results. You will learn why a recording made at a higher sampling rate sounds better and costs more, what a sample resolution of 8 bits gets you that 4 bits does not, and how to run the file size formula backwards to find a missing setting.
Manufura
- Understand that sound is analogue and that it must be converted to a digital form for storage and processing in a computer. Understand that sound waves are sampled to create the digital version of sound. Describe the digital representation of sound in terms of:
- sampling rate
- sample resolution.
- Calculate sound file sizes based on the sampling rate and the sample resolution.
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Representing Sound. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- What does a single sample of a sound record? A. The amplitude of the wave at a point in time B. The number of bits in the file C. The length of the recording D. The number of samples taken per second Answer: A
- A recording has a sampling rate of 16,000 Hz. What does this mean? A. Each sample uses 16,000 bits B. 16,000 samples are taken every second C. The recording lasts 16,000 seconds D. The file is 16,000 bytes Answer: B
- A 4 second recording uses a sampling rate of 10,000 Hz and a sample resolution of 8 bits. What is the file size in bits? A. 40,000 B. 80,000 C. 320,000 D. 640,000 Answer: C
- A sample resolution of 8 bits allows how many different amplitude levels? A. 8 B. 16 C. 64 D. 256 Answer: D
- A recording is remade with the sampling rate doubled and everything else unchanged. What happens to the file size? A. It halves B. It stays the same C. It doubles D. It quadruples Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Representing Sound? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
