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API SPEC 14L: Lock Mandrels and Landing Nipples : Reaffirmed

$

273

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API SPEC 20F: Corrosion Resistant Bolting for Use in the Petroleum and Natural Gas Industries : Reaffirmed

$

169

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API TR 5NCL Nickel Content Limits for API 5CT Sour Service Products

$

149

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API SPEC 19ICD: Inflow Control Devices : Reaffirmed

$

189

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API MPMS CH 23.2: Reconciliation of Liquid Tank Car(s) Quantities : Reaffirmed

$

218

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API SPEC 16A: Specification for Drill-through Equipment

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322

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API RP 13B-2: Field Testing Oil-based Drilling Fluids wA1

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388

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ISO 9613:1993

ISO 9613:1993 Acoustics – Attenuation of sound during propagation outdoors – Part 1: Calculation of the absorption of sound by the atmosphere

CDN $233.00

Description

Specifies an analytical method of calculating the attenuation of sound as a result of atmospheric absorption for a variety of meteorological conditions. For pure-tone sounds, attenuation due to atmospheric absorption is specified in terms of an attenuation coefficient as a function of the frequency of the sound (50 Hz to 10 kHz), the temperature (- 20 °C to + 50 °C), the relative humidity (10 % to 100 %) and pressure (101,325 kPa) of the air. Formulae are also given for wider ranges (e.g. ultrasonic frequencies, lower pressure) and for other than pure tones.

Edition

1

Published Date

1993-06-03

Status

PUBLISHED

Pages

26

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

Specifies an analytical method of calculating the attenuation of sound as a result of atmospheric absorption for a variety of meteorological conditions. For pure-tone sounds, attenuation due to atmospheric absorption is specified in terms of an attenuation coefficient as a function of the frequency of the sound (50 Hz to 10 kHz), the temperature (- 20 °C to + 50 °C), the relative humidity (10 % to 100 %) and pressure (101,325 kPa) of the air. Formulae are also given for wider ranges (e.g. ultrasonic frequencies, lower pressure) and for other than pure tones.

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