Year 9

Year 9

# Good vibrations

## Lesson details

### Key learning points

1. In this lesson, we will familiarise ourselves with the basic concepts necessary for understanding any analogue to digital conversion; samples, sampling rate, and sample size.

### Content guidance

• Contains external content.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Exit quiz

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### 5 Questions

Q1.
Turning to Bits Your local council has installed a public access WiFi system. It monitors the quality of the service by measuring the strength of the WiFi signal at 20 locations. Every 10 minutes, it receives a sequence of 3 bits from each location. This is essentially a number that indicates how strong the signal is: 000 001 010 011 100 101 110 111 (000 being low signal and 111 being high signal) How many bits are received from each location in one day? You may need to use a calculator for this question.
224 bits
228 bits
24 bits
Q2.
The measurements(3 bits) received from each location are called ...........................
Sample rate
Sample size
Q3.
The number of bits in each measurement is called...................................
Sample rate