Electronic Music Quiz. Sussex Uni. 1. Introduction

Frequency measures the number of cycles of a sine wave that occur in one second. It is expressed in Hertz (Hz), which represents the number of cycles per second. Therefore, the correct answer is "Cycles per second."

A digital signal is a discrete signal because it is represented by a sequence of distinct values or levels. Unlike analog signals, which are continuous and can take on any value within a range, digital signals have a finite number of possible values. These values are typically represented by binary digits (0s and 1s) and can be easily processed and transmitted by digital systems. Therefore, the correct answer is "discrete."

Psychoacoustics is the scientific study of how humans perceive and interpret sound. It focuses on understanding how the human auditory system processes and perceives various sound stimuli. The answer "What humans can detect from sound" accurately describes the essence of psychoacoustics, as it encompasses the study of what humans are able to perceive and detect from the auditory signals they receive.

Decibels measure the amplitude of a sound wave. Amplitude refers to the maximum displacement of a wave from its equilibrium position. In the context of sound, it represents the loudness or intensity of the sound. Decibels are a logarithmic scale used to quantify the ratio between two sound intensities, with each increase of 10 decibels indicating a tenfold increase in sound intensity. Therefore, decibels are used to measure the amplitude or strength of sound waves.

The term "the amplitude of a sound" refers to the measure of the maximum displacement of a sound wave from its equilibrium position. This displacement determines the intensity or loudness of the sound. Therefore, "the loudness of a sound" is a more common term used to describe the amplitude of a sound wave.

Sine waves are the simplest periodic sounds because they have a single frequency and no harmonics. They have a smooth, repetitive waveform that can be represented mathematically by a sine function. Sine waves are fundamental in understanding and analyzing various aspects of sound and signal processing. They form the basis for many musical tones and are used in fields such as acoustics, electronics, and telecommunications.

The harmonic series refers to the multiples of the fundamental frequency in a periodic sound. These multiples are called harmonics.

The missing word in the statement "Analogue is a ... signal" is "continuous". This is because an analog signal is a continuous waveform that represents information in a continuous manner, as opposed to discrete signals which are represented in a series of separate values.

The statement is true because the hearing range at infancy, which refers to the period of early childhood, is generally considered to be between 20 Hz and 20,000 Hz. This means that infants are capable of perceiving sounds within this frequency range. However, it is important to note that individual variations may exist, and some infants may have a slightly narrower or wider hearing range.

The electrostatic force between two opposite charges cannot be seen as a form or representation of sound because sound is a mechanical wave that requires a medium to propagate, such as air or water. The electrostatic force, on the other hand, is a static force that acts between charged particles and does not involve any mechanical vibrations or waves. Therefore, it does not have any direct connection to the perception or transmission of sound.

The correct answer is "period sounds" because sounds that repeat themselves at regular intervals are referred to as period sounds. This term is commonly used in the field of physics and acoustics to describe sounds that have a distinct pattern of repetition. It is important to note that the other options, such as frequent sounds or repetitive sounds, do not specifically indicate the regularity or periodic nature of the sound.

The correct answer is 16 Hertz - 16000 Hertz. This range represents the frequencies that young adults are typically able to hear. The lower end of the range, 16 Hertz, corresponds to lower-pitched sounds, while the higher end, 16000 Hertz, corresponds to higher-pitched sounds. This range is considered normal for individuals with good hearing in the young adult age group.