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  2. Hearing range - Wikipedia

    en.wikipedia.org/wiki/Hearing_range

    Bats that can detect 200 kHz cannot hear very well below 10 kHz. [25] In any case, the most sensitive range of bat hearing is narrower: about 15 kHz to 90 kHz. [25] Bats navigate around objects and locate their prey using echolocation. A bat will produce a very loud, short sound and assess the echo when it bounces back.

  3. Orders of magnitude (frequency) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    25.1 kHz Acoustic – G 10, the highest pitch sung by Georgia Brown, who has a vocal range of 8 octaves. 44.1 kHz: Common audio sampling frequency: 10 5: 100 kHz: 740 kHz: The clock speed of the world's first commercial microprocessor, the Intel 4004 (1971) 10 6: 1 megahertz (MHz) 530 kHz to 1.710 MHz: Electromagnetic – AM radio broadcasts 1 ...

  4. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    However, the speed of sound varies from substance to substance: typically, sound travels most slowly in gases, faster in liquids, and fastest in solids. For example, while sound travels at 343 m/s in air, it travels at 1481 m/s in water (almost 4.3 times as fast) and at 5120 m/s in iron (almost 15 times as fast).

  5. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human.The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch.

  6. Sound - Wikipedia

    en.wikipedia.org/wiki/Sound

    The speed of sound depends on the medium the waves pass through, and is a fundamental property of the material. The first significant effort towards measurement of the speed of sound was made by Isaac Newton. He believed the speed of sound in a particular substance was equal to the square root of the pressure acting on it divided by its density:

  7. ISO 31-7 - Wikipedia

    en.wikipedia.org/wiki/ISO_31-7

    Quantity Unit Remarks Name Symbol Definition Name Symbol period, periodic time: T: time of one cycle: second: s: frequency: f, ν: f = 1/T: hertz: Hz: 1 Hz = 1 s −1: loudness level: L N: L N = ln(p eff /p 0) 1 kHz where p eff is the root-mean-square value of the sound pressure of a pure tone of 1 kHz, which is judged by a normal observer under standardized listening conditions as being as ...

  8. Audio system measurements - Wikipedia

    en.wikipedia.org/wiki/Audio_system_measurements

    The frequency range often specified for audio components is between 20 Hz to 20 kHz, which broadly reflects the human hearing range (the highest audible frequency for most people is less than 20 kHz, with 16 kHz being more typical [4]). Components with 'flat' frequency responses are often described as being linear.

  9. Ultrasound - Wikipedia

    en.wikipedia.org/wiki/Ultrasound

    Porpoises have the highest known upper hearing limit at around 160 kHz. [27] Several types of fish can detect ultrasound. In the order Clupeiformes, members of the subfamily Alosinae have been shown to be able to detect sounds up to 180 kHz, while the other subfamilies (e.g. herrings) can hear only up to 4 kHz. [28]