Input-output (I/O) functions of hearing aids were measured in response to a 2000 Hz tone burst, having 0.5 ms rise/fall time and 10 ms duration. Findings indicated that the steady-state output limitation characteristics of hearing aids cannot be estimated from their onset responses. (Author/DB)

Nine custom-made mouth-protector materials were tested for hardness, tear strength, tear energy, and visibility. Results are discussed. (Author/MT)

The results of three recently presented clinical studies and a biomechanical study of the use of lateral knee braces to prevent knee injuries are reviewed. The results raise serious doubts about the efficacy of the preventive knee braces which are currently available. (Author/MT)

Fifty-five adults with sensorineural hearing impairments participated in the study which indicated nonsignificant interaid performance differences among electroacoustically homogeneous aids. Among other conclusions were that the comparative hearing aid evaluation will not be a good predictor of success in daily communication unless relatively…

Safety, durability, and maintenance costs should be considered when purchasing playground equipment. Other factors that affect equipment choice are the ages of the children using the playground, whether the playground will double as a public park, and whether the equipment is expandable. (MLF)

A description of a new process which creates motion pictures without the usual motion materials, without the usual production crews.. and at lower costs." (Author/AK)

Lists twenty criteria the author feels should be considered in selecting a cassette tape recorder and includes a few suggestions for use. (AA)

Reviews the development of cassette tapes and explains some of the operational features of the cassette tape system. (AA)

The author explains why he suggests another substitutive innovation--the cassette for the phonodisc." (Author/AA)