SOUND

• The sound level meter is used to measure the intensity of sounds.
• Sound waves are longitudinal waves that require a medium to travel through, such as air or water.
• Sound waves can be described by their frequency (number of oscillations per second) and amplitude (height of wave).
• Frequency is measured in Hertz (Hz), with higher frequencies resulting in higher pitch sounds.
• Frequency determines pitch, while amplitude determines loudness.
• Amplitude determines how loud a sound is perceived, with larger amplitudes producing louder sounds.
• Amplitude is measured in decibels (dB), with larger amplitudes representing louder sounds.
• Wavelength refers to the distance between two consecutive peaks or troughs on a wave.
• Amplitude is measured in decibels (dB), with higher amplitudes indicating louder sounds.
• Amplitude is measured in decibels (dB), with larger amplitudes indicating louder sounds.
• The human ear can detect sounds ranging from about 20 Hz to 20 kHz, although sensitivity decreases at both ends of this range.
• Decibel levels above 85 dB can cause hearing damage over time.
• Pitch refers to how high or low a sound appears to us, while loudness refers to its perceived volume.
• Humans have a range of hearing from about 20-20,000 Hz, but this varies between individuals.
• Longer wavelengths have lower frequencies and shorter wavelengths have higher frequencies.
• Hearing loss occurs when hair cells in the inner ear become damaged due to exposure to high-intensity noise.
• Sound waves require a medium to propagate to interact with the particles present in them. Sound waves are called mechanical waves.
• Amplitude – The loudness of the sound and its amplitude is directly related to each other. The larger the amplitude, the louder the sound.
• Frequency – The pitch of the sound and its frequency is directly related to each other. If the pitch is high, then the frequency of sound is also high.