摘要:

The difference limen for onest–offset phase was measured for tone bursts with an integer number of periods, rectangular envelopes, and durations between 4 and 128 msec. The difference limen was found to be smaller at 1000 Hz than at 250 and 4000 Hz, and to increase as the duration of impulses increased.Subject Classification: [43]65.60, [43]65.75.

ISSN:0001-4966    

DOI:10.1121/1.381001

出版商:Acoustical Society of America    

年代:1976

数据来源: AIP

摘要:

In view of the difficulty of reaching agreement about a system of unambiguous musical notation not using the stave, a proposal based on the recognized importance of the concept of ’’middle C’’ is put forward.Subject Classification: [43]75.23.

ISSN:0001-4966    

DOI:10.1121/1.381002

出版商:Acoustical Society of America    

年代:1976

数据来源: AIP

摘要:

The antigenicity and enzyme activity of dilute solutions of RNAse exposed to ultrasonic cavitation have been measured as a function of exposure time. The rate of decrease of antigenicity was one‐eighth of the rate of enzyme activity loss. The implication of the results for the use of ultrasound in antigen preparation is discussed.Subject Classification: [43]80.40.

ISSN:0001-4966    

DOI:10.1121/1.381003

出版商:Acoustical Society of America    

年代:1976

数据来源: AIP

摘要:

Photographic observations of pronghorn antelope suggested mild disturbance by helicopter noise levels at approximately 60‐dBAand strong reactions at approximately 77‐dBA.Subject Classification: [43]80.60; [43]50.50.

ISSN:0001-4966    

DOI:10.1121/1.381004

出版商:Acoustical Society of America    

年代:1976

数据来源: AIP

ISSN:0001-4966    

DOI:10.1121/1.381005

出版商:Acoustical Society of America    

年代:1976

数据来源: AIP