Definition of SOUND

SOUND Adjective and Noun

Sound can function as both an adjective and a noun. As an adjective, it refers to something that is healthy, functioning properly, and free from defect or damage. As a noun, it denotes vibrations that travel through the air or another medium and can be heard when they reach a person’s or animal’s ear.

SOUND as an adjective

Healthy and Functioning Properly: As an adjective, sound describes objects, systems, or individuals that are in good condition, functioning as expected, and free from illness or injury. It implies robustness, stability, and reliability, indicating that something is operating efficiently and without any significant issues or flaws.

SOUND as a noun

Audible Vibrations: As a noun, sound refers to vibrations that propagate through a medium, such as air, water, or solids, and are capable of being perceived by the auditory system of living organisms. These vibrations produce sensations of hearing when they reach the ear and are processed by the brain, allowing for the perception of sound.

Acoustic Waves: Sound consists of acoustic waves that travel through a medium as variations in pressure. These waves can originate from various sources, such as voices, musical instruments, machinery, or natural phenomena, and they carry information about the sound’s frequency, intensity, duration, and direction.

Communication and Perception: Sound serves as a vital means of communication and perception for humans and many other species. It enables the transmission of information, emotions, warnings, and expressions through speech, music, environmental sounds, and animal vocalizations, facilitating interaction and understanding in diverse contexts.

Properties and Characteristics: The study of sound encompasses various properties and characteristics, including frequency (pitch), amplitude (volume), duration (length), and timbre (quality). These attributes determine the perceived qualities of sound and its significance in different contexts, such as music, speech, acoustics, and psychoacoustics.

Sound is a versatile term that can function as both an adjective and a noun. As an adjective, it signifies health, functionality, and absence of defects. As a noun, it refers to audible vibrations that propagate through a medium and are perceived by living organisms, serving as a crucial means of communication, perception, and expression in human society and the natural world.

Examples of SOUND in a sentence

SOUND as an adjective in a sentence

  • The bridge was built on a sound foundation, ensuring its stability.
  • She made a sound decision to invest in the company’s stock.
  • The argument presented by the lawyer was sound and logical.
  • The building underwent a sound inspection to ensure compliance with safety standards.
  • His reasoning seemed sound and well thought out.
  • The company’s financial strategy appeared sound and sustainable.
  • The advice he received from his mentor was sound and practical.
  • The equipment underwent sound testing before being approved for use.

SOUND as a noun in a sentence

  • The sound of waves crashing against the shore was soothing.
  • He heard a strange sound coming from the attic.
  • The musician experimented with different sounds to create a unique composition.
  • The alarm clock emitted a loud sound that jolted him awake.
  • The engineer analyzed the sound produced by the engine to identify any issues.
  • She closed her eyes and listened to the calming sounds of nature.
  • The teacher used various sounds to teach phonics to her students.
  • The sound of laughter filled the room as friends gathered for the party.

Origin of SOUND

The term sound traverses the domain of auditory sensation and vibration, embodying qualities of vibration, resonance, and perceptible energy. Rooted in physics and human perception, it has evolved into a noun that encompasses both the physical phenomenon of vibrations traveling through a medium and the sensory experience of hearing.

  • Physical Phenomenon: Sound refers to the propagation of mechanical vibrations through a medium such as air, water, or solids. These vibrations create waves of energy that travel outward from the source, carrying information about the source’s properties, such as pitch, volume, and timbre.
  • Auditory Sensation: Sound also describes the sensory experience of perceiving these vibrations through the auditory system. When sound waves reach the ear, they cause the eardrum to vibrate, triggering a chain of physiological processes that result in the perception of sound in the brain.
  • Pitch and Frequency: Sound is characterized by its pitch, which corresponds to the frequency of the vibrations, measured in hertz (Hz). Higher frequencies produce higher-pitched sounds, while lower frequencies produce lower-pitched sounds. Pitch influences the perceived musicality and tonality of a sound.
  • Volume and Amplitude: Sound intensity, or volume, is determined by the amplitude of the vibrations, measured in decibels (dB). Greater amplitude corresponds to louder sounds, while lesser amplitude corresponds to quieter sounds. Volume influences the perceived distance and presence of a sound.
  • Timbre and Quality: Sound timbre refers to the unique quality or coloration of a sound, influenced by factors such as harmonics, overtones, and resonance. Timbre distinguishes between different sound sources, allowing listeners to identify and distinguish between voices, instruments, and environmental sounds.
  • Communication and Expression: Sound serves as a fundamental medium for communication, expression, and artistic creation. Speech, music, and other auditory forms convey meaning, emotion, and cultural identity through patterns of sound and rhythm.
  • Environmental Awareness: Sound plays a crucial role in environmental awareness and perception, providing information about the surrounding environment, including spatial orientation, proximity to objects, and changes in the environment over time.
  • Technological Applications: Sound has diverse technological applications, ranging from audio recording and reproduction to acoustic sensing and communication. Advances in sound technology have revolutionized entertainment, communication, and scientific research.

Sound encapsulates the essence of vibration, sensation, and communication, reflecting qualities of pitch, volume, and timbre in both physical and perceptual domains. From its roots in physics and physiology to its broader implications for human experience and technology, the term embodies the richness and complexity of auditory perception and expression.


  • Noise
  • Audio
  • Tone
  • Resonance
  • Melody
  • Echo
  • Vibration
  • Harmony


  • Silence
  • Quiet
  • Stillness
  • Muteness
  • Hush
  • Tranquility
  • Calm
  • Serenity


  • Acoustics
  • Pitch
  • Frequency
  • Rhythm
  • Volume
  • Sonorous
  • Auditory
  • Sonic

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