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The Noise Pollution and Abatement Act of 1972 is a statute of the United States initiating a federal program of regulating noise pollution with the intent of protecting human health and minimizing annoyance of noise to the general public.
Noise pollution, or sound pollution, is the propagation of noise or sound with potential harmful effects on humans and animals. The source of outdoor noise worldwide is mainly caused by machines, transport and propagation systems.
Most English speakers around the world can understand radio programmes, television programmes, and films from many parts of the English-speaking world. [102] Both standard and non-standard varieties of English can include both formal or informal styles, distinguished by word choice and syntax and use both technical and non-technical registers ...
The Sound Pattern of English (frequently referred to as SPE) is a 1968 work on phonology by Noam Chomsky and Morris Halle. In spite of its title, it presents not only a view of the phonology of English, but also discussions of a large variety of phonological phenomena of many other languages. The index lists about 100 such languages.
Speech Transmission Index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal.
For a table that shows the pronunciations of these vowels in a wider range of English accents, see Sound correspondences between English accents. The following tables show the vowel phonemes of three standard varieties of English. The notation system used here for Received Pronunciation (RP) is fairly standard; the others less so.
An amplifier must be able to suppress resonances caused by mechanical motion (e.g., inertia) of a speaker cone, especially a low-frequency driver with greater mass. For conventional loudspeaker drivers, this essentially involves ensuring that the output impedance of the amplifier is close to zero and that the speaker wires are sufficiently ...
One of the most difficult is German /eː/ as it is further forward in the mouth than in varieties of Standard English so that speakers may pronounce German geht as if it were English gate. [7] Similarly, speakers may pronounce German /oː/ with the vowel of goat so that ohne is pronounced [ˈəʊnə]. [8] Speakers tend to have difficulty with ...